migraine days per month) (initiated by a specialist)

▶ BY SUBCUTANEOUS INJECTION

▶ Adult: 70 mg every 4 weeks; increased if necessary to

140 mg every 4 weeks, consider discontinuing if no

response after 3 months of treatment

l SIDE-EFFECTS

▶ Common or very common Constipation . muscle spasms . skin reactions

▶ Frequency not known Oedema . swelling

BNF 78 Migraine 477

Nervous system

4

l PREGNANCY Manufacturer advises avoid—limited

information available.

l BREAST FEEDING Manufacturer advises avoid during first

few days after birth—possible risk from transfer of

antibodies to infant. After this time, use during breastfeeding only if clinically needed.

l DIRECTIONS FOR ADMINISTRATION Manufacturer advises

injection into the abdomen, thigh, or upper arm (if not

self-administered). Patients may self-administer Aimovig

® after appropriate training in subcutaneous injection

technique.

l HANDLING AND STORAGE Manufacturer advises store in a

refrigerator (2-8°C) and protect from light—consult

product literature for further information regarding

storage outside refrigerator.

l PATIENT AND CARER ADVICE

Self-administration Manufacturer advises that patients and

their carers should be given training in subcutaneous

injection technique if appropriate.

l NATIONAL FUNDING/ACCESS DECISIONS

Scottish Medicines Consortium (SMC) decisions

SMC No. SMC2134

The Scottish Medicines Consortium has advised (April 2019)

that erenumab (Aimovig ®) is accepted for restricted use

within NHS Scotland for the prophylaxis of migraine in

adults who have at least four migraine days per month and

in whom at least three prior prophylactic treatments have

failed. This advice is contingent upon the continuing

availability of the patient access scheme in NHS Scotland

or a list price that is equivalent or lower.

l MEDICINAL FORMS There can be variation in the licensing of

different medicines containing the same drug.

Solution for injection

▶ Aimovig (Novartis Pharmaceuticals UK Ltd) A

Erenumab 70 mg per 1 ml Aimovig 70mg/1ml solution for injection

pre-filled pen | 1 pre-filled disposable injection P £386.50

(Hospital only)

ERGOT ALKALOIDS

Ergotamine tartrate

l INDICATIONS AND DOSE

Management of cluster headache

▶ BY MOUTH USING TABLETS

▶ Adult: 1 mg once daily for 6 nights in 7; occasionally

given for 1–2 weeks, dose to be taken at night

l UNLICENSED USE Not licensed for the management of

cluster headache.

l CONTRA-INDICATIONS Acute porphyrias p. 1058 . coronary

heart disease . hyperthyroidism . inadequately controlled

hypertension . obliterative vascular disease . peripheral

vascular disease . Raynaud’s syndrome . sepsis . severe

hypertension .temporal arteritis

l CAUTIONS Anaemia . cardiac disease . dependence . elderly .risk of peripheral vasospasm

l INTERACTIONS → Appendix 1: ergotamine

l SIDE-EFFECTS

▶ Common or very common Abdominal pain . dizziness . nausea . vomiting

▶ Uncommon Cyanosis . diarrhoea . muscle weakness . pain

in extremity . sensation abnormal . vasoconstriction

▶ Rare or very rare Arrhythmias . cardiac valve fibrosis . dyspnoea . ergot poisoning (including absence of pulse and

numbness in extremities). gangrene . intestinal ischaemia . myalgia . myocardial infarction . myocardial ischaemia . skin reactions

▶ Frequency not known Anxiety . arthralgia . blood disorder. cerebral ischaemia . confusion . constipation . depression .

drowsiness . dry mouth . extrapyramidal symptoms . hallucination .renal artery spasm . seizure . sleep disorder. thrombosis .tremor. urinary retention . vision blurred

l PREGNANCY Avoid; oxytocic effect on the uterus.

l BREAST FEEDING Avoid; ergotism may occur in infant;

repeated doses may inhibit lactation.

l HEPATIC IMPAIRMENT Avoid in severe impairment—risk of

toxicity increased.

l RENAL IMPAIRMENT Avoid; risk of renal vasoconstriction.

l PATIENT AND CARER ADVICE

Peripheral vasospasm Warn patient to stop treatment

immediately if numbness or tingling of extremities

develops and to contact doctor.

l LESS SUITABLE FOR PRESCRIBING Ergotamine tartrate is

less suitable for prescribing.

l MEDICINAL FORMS No licensed medicines listed.

Ergotamine tartrate with caffeine

hydrate and cyclizine hydrochloride

The properties listed below are those particular to the

combination only. For the properties of the components

please consider, ergotamine tartrate above, cyclizine p. 430.

l INDICATIONS AND DOSE

Treatment of acute migraine and migraine variants

unresponsive to analgesics

▶ BY MOUTH

▶ Adult: 1 tablet, to be taken at onset, followed by

0.5–1 tablet after 30 minutes, then 0.5–1 tablet every

30 minutes if required, max. 3 tablets in 24 hours, max.

4 tablets per attack, max. 6 tablets in one week

l INTERACTIONS → Appendix 1: antihistamines, sedating . ergotamine

l PATIENT AND CARER ADVICE Patient counselling is advised

for cyclizine hydrochloride with caffeine hydrate and

ergotamine tartrate tablets (dosage).

l LESS SUITABLE FOR PRESCRIBING Cyclizine hydrochloride

with caffeine hydrate and ergotamine tartrate (Migril ®) is

less suitable for prescribing.

l MEDICINAL FORMS There can be variation in the licensing of

different medicines containing the same drug.

Tablet

CAUTIONARY AND ADVISORY LABELS 2, 18

▶ Migril (Wockhardt UK Ltd)

Ergotamine tartrate 2 mg, Cyclizine hydrochloride 50 mg,

Caffeine hydrate 100 mg Migril tablets | 100 tablet P £51.00

TRIPTANS

Almotriptan 21-Jul-2018

l INDICATIONS AND DOSE

Treatment of acute migraine

▶ BY MOUTH

▶ Adult: 12.5 mg, dose to be taken as soon as possible

after onset, followed by 12.5 mg after 2 hours if

required, dose to be taken only if migraine recurs

(patient not responding to initial dose should not take

second dose for same attack); maximum 25 mg per day

l UNLICENSED USE Not licensed for use in elderly.

l CONTRA-INDICATIONS Coronary vasospasm . ischaemic

heart disease . peripheral vascular disease . previous

cerebrovascular accident. previous myocardial infarction . previous transient ischaemic attack . Prinzmetal’s angina . severe hypertension . uncontrolled hypertension

478 Pain BNF 78

Nervous system

4

l CAUTIONS Conditions which predispose to coronary artery

disease . elderly

l INTERACTIONS → Appendix 1: almotriptan

l SIDE-EFFECTS

▶ Common or very common Asthenia . dizziness . drowsiness . nausea . vomiting

▶ Uncommon Bone pain . chest pain . diarrhoea . dry mouth . dyspepsia . headache . myalgia . palpitations . paraesthesia .throat tightness .tinnitus

▶ Rare or very rare Coronary vasospasm . myocardial

infarction .tachycardia

▶ Frequency not known Intestinal ischaemia . seizure . vision

disorders

SIDE-EFFECTS, FURTHER INFORMATION Discontinue if

symptoms of heat, heaviness, pressure or tightness

(including throat and chest) occur.

l ALLERGY AND CROSS-SENSITIVITY Caution in patients with

sensitivity to sulfonamides.

l PREGNANCY There is limited experience of using 5HT1-

receptor agonists during pregnancy; manufacturers advise

that they should be avoided unless the potential benefit

outweighs the risk.

l BREAST FEEDING Present in milk in animal studies—

withhold breast-feeding for 24 hours.

l HEPATIC IMPAIRMENT Manufacturer advises caution in

mild to moderate impairment; avoid in severe

impairment—no information available.

l RENAL IMPAIRMENT

Dose adjustments Max. 12.5 mg in 24 hours if eGFR less

than 30 mL/minute/1.73 m2

.

l MEDICINAL FORMS There can be variation in the licensing of

different medicines containing the same drug.

Tablet

CAUTIONARY AND ADVISORY LABELS 3

▶ Almotriptan (Non-proprietary)

Almotriptan (as Almotriptan hydrogen malate)

12.5 mg Almotriptan 12.5mg tablets | 3 tablet P £6.65–£9.07 | 6 tablet P £18.14 DT = £16.01 | 9 tablet P £22.73–£27.20

▶ Almogran (Almirall Ltd)

Almotriptan (as Almotriptan hydrogen malate) 12.5 mg Almogran

12.5mg tablets | 3 tablet P £9.07 | 6 tablet P £18.14 DT =

£16.01

Eletriptan 15-Mar-2017

l INDICATIONS AND DOSE

Treatment of acute migraine

▶ BY MOUTH

▶ Adult: 40 mg, followed by 40 mg after 2 hours if

required, dose to be taken only if migraine recurs

(patient not responding to initial dose should not take

second dose for same attack); increased if necessary to

80 mg, dose to be taken for subsequent attacks if 40 mg

dose inadequate; maximum 80 mg per day

l UNLICENSED USE Not licensed for use in elderly.

l CONTRA-INDICATIONS Arrhythmias . coronary vasospasm . heart failure . ischaemic heart disease . peripheral vascular

disease . previous cerebrovascular accident. previous

myocardial infarction . previous transient ischaemic attack . Prinzmetal’s angina . severe hypertension . uncontrolled

hypertension

l CAUTIONS Conditions which predispose to coronary artery

disease . elderly

l INTERACTIONS → Appendix 1: eletriptan

l SIDE-EFFECTS

▶ Common or very common Arrhythmias . asthenia . chest

discomfort. chills . dizziness . drowsiness . dry mouth . feeling hot. flushing . gastrointestinal discomfort.

headache . hyperhidrosis . increased risk of infection . muscle complaints . muscle tone increased . muscle

weakness . nausea . pain . palpitations . sensation

abnormal .throat tightness . vertigo

▶ Uncommon Agitation . appetite decreased . arthralgia . arthritis . confusion . depersonalisation . depression . diarrhoea . dyspnoea . ear pain . eye pain . insomnia . lacrimation disorder. malaise . mood altered . movement

disorders . oedema . oral disorders . peripheral vascular

disease .respiratory disorder. skin reactions . speech

disorder. stupor.taste altered .thinking abnormal .thirst. tinnitus .tremor. urinary disorders . urinary tract disorder . vision disorders . yawning

▶ Rare or very rare Asthma . breast pain . burping . conjunctivitis . constipation . gastrointestinal disorders . hyperbilirubinaemia . lymphadenopathy . menorrhagia . myopathy . shock . voice alteration

▶ Frequency not known Coronary vasospasm . hypertension . myocardial infarction . myocardial ischaemia . serotonin

syndrome . stroke . syncope . vomiting

SIDE-EFFECTS, FURTHER INFORMATION Discontinue if

symptoms of heat, heaviness, pressure or tightness

(including throat and chest) occur.

l PREGNANCY There is limited experience of using 5HT1-

receptor agonists during pregnancy; manufacturers advise

that they should be avoided unless the potential benefit

outweighs the risk.

l BREAST FEEDING Present in milk—avoid breast-feeding

for 24 hours.

l HEPATIC IMPAIRMENT Manufacturer advises avoid in

severe impairment.

l RENAL IMPAIRMENT Avoid if eGFR less than

30 mL/minute/1.73 m2

.

Dose adjustments Reduce initial dose to 20 mg; maximum

40 mg in 24 hours.

l MEDICINAL FORMS There can be variation in the licensing of

different medicines containing the same drug.

Tablet

CAUTIONARY AND ADVISORY LABELS 3

▶ Relpax (Pfizer Ltd)

Eletriptan (as Eletriptan hydrobromide) 20 mg Relpax 20mg

tablets | 6 tablet P £22.50 DT = £22.50

Eletriptan (as Eletriptan hydrobromide) 40 mg Relpax 40mg

tablets | 6 tablet P £22.50 DT = £22.50

Frovatriptan 14-Jul-2018

l INDICATIONS AND DOSE

Treatment of acute migraine

▶ BY MOUTH

▶ Adult: 2.5 mg, dose to be taken as soon as possible after

onset, followed by 2.5 mg after 2 hours if required, dose

to be taken only if migraine recurs (patient not

responding to initial dose should not take second dose

for same attack); maximum 5 mg per day

l UNLICENSED USE Not licensed for use in elderly.

l CONTRA-INDICATIONS Coronary vasospasm . ischaemic

heart disease . peripheral vascular disease . previous

cerebrovascular attack . previous myocardial infarction . previous transient ischaemic attack . Prinzmetal’s angina . severe hypertension . uncontrolled hypertension

l CAUTIONS Conditions which predispose to coronary artery

disease . elderly

l INTERACTIONS → Appendix 1: frovatriptan

l SIDE-EFFECTS

▶ Common or very common Asthenia . chest discomfort. dizziness . drowsiness . dry mouth . flushing . gastrointestinal discomfort. headache . hyperhidrosis .

BNF 78 Migraine 479

Nervous system

4

nausea . sensation abnormal .throat complaints . vision

disorders

▶ Uncommon Anxiety . arrhythmias . arthralgia . concentration impaired . confusion . dehydration . depression . diarrhoea . dysphagia . ear discomfort. eye

discomfort. gastrointestinal disorders . hypertension . increased risk of infection . malaise . musculoskeletal

stiffness . neuromuscular dysfunction . pain . palpitations . peripheral coldness . psychiatric disorders . skin reactions . sleep disorders .taste altered .temperature sensation

altered .thirst.tinnitus .tremor. urinary disorders . vertigo

▶ Rare or very rare Breast tenderness . burping . constipation . ear disorder. epistaxis .fever. hiccups . hyperacusia . hypoglycaemia . irritable bowel syndrome . lymphadenopathy . memory loss . movement disorder. oesophageal spasm . oral disorders . piloerection .reflexes

decreased .renal pain .respiratory disorders . self

mutilation

▶ Frequency not known Angioedema . coronary vasospasm . hypersensitivity . myocardial infarction

SIDE-EFFECTS, FURTHER INFORMATION Discontinue if

symptoms of heat, heaviness, pressure or tightness

(including throat and chest) occur.

l PREGNANCY There is limited experience of using 5HT1-

receptor agonists during pregnancy; manufacturers advise

that they should be avoided unless the potential benefit

outweighs the risk.

l BREAST FEEDING Present in milk in animal studies—

withhold breast-feeding for 24 hours.

l HEPATIC IMPAIRMENT Manufacturer advises avoid in

severe impairment—no information available.

l MEDICINAL FORMS There can be variation in the licensing of

different medicines containing the same drug.

Tablet

CAUTIONARY AND ADVISORY LABELS 3

▶ Frovatriptan (Non-proprietary)

Frovatriptan (as Frovatriptan succinate monohydrate)

2.5 mg Frovatriptan 2.5mg tablets | 6 tablet P £4.40–£16.67 DT

= £4.56

▶ Migard (A. Menarini Farmaceutica Internazionale SRL)

Frovatriptan (as Frovatriptan succinate monohydrate)

2.5 mg Migard 2.5mg tablets | 6 tablet P £16.67 DT = £4.56

▶ Mylatrip (Mylan)

Frovatriptan (as Frovatriptan succinate monohydrate)

2.5 mg Mylatrip 2.5mg tablets | 6 tablet P £16.50 DT = £4.56

Naratriptan

l INDICATIONS AND DOSE

Treatment of acute migraine

▶ BY MOUTH

▶ Adult: 2.5 mg, followed by 2.5 mg after at least 4 hours

if required, to be taken only if migraine recurs (patient

not responding to initial dose should not take second

dose for same attack); maximum 5 mg per day

l UNLICENSED USE Not licensed for use in elderly.

l CONTRA-INDICATIONS Coronary vasospasm . ischaemic

heart disease . moderate or severe hypertension . peripheral vascular disease . previous cerebrovascular

accident. previous myocardial infarction . previous

transient ischaemic attack . Prinzmetal’s angina . uncontrolled hypertension

l CAUTIONS Conditions which predispose to coronary artery

disease . elderly

l INTERACTIONS → Appendix 1: naratriptan

l SIDE-EFFECTS

▶ Common or very common Dizziness . drowsiness .fatigue . feeling hot. malaise . nausea . paraesthesia . vomiting

▶ Uncommon Arrhythmias . feeling abnormal . pain . palpitations . visual impairment

▶ Rare or very rare Angina pectoris . colitis ischaemic . coronary vasospasm .face oedema . myocardial infarction . peripheral vascular disease . skin reactions

SIDE-EFFECTS, FURTHER INFORMATION Discontinue if

symptoms of heat, heaviness, pressure or tightness

(including throat and chest) occur.

l ALLERGY AND CROSS-SENSITIVITY Caution in patients with

sensitivity to sulfonamides.

l PREGNANCY There is limited experience of using 5HT1-

receptor agonists during pregnancy; manufacturers advise

that they should be avoided unless the potential benefit

outweighs the risk.

l BREAST FEEDING Withhold breast-feeding for 24 hours.

l HEPATIC IMPAIRMENT Manufacturer advises caution in

mild to moderate impairment (risk of decreased

clearance); avoid in severe impairment.

Dose adjustments Manufacturer advises maximum 2.5 mg

in 24 hours in mild to moderate impairment.

l RENAL IMPAIRMENT Avoid if eGFR less than

15 mL/minute/1.73 m2

.

Dose adjustments Max. 2.5 mg in 24 hours.

l PATIENT AND CARER ADVICE

Driving and skilled tasks Drowsiness may affect

performance of skilled tasks (e.g. driving).

l MEDICINAL FORMS There can be variation in the licensing of

different medicines containing the same drug.

Tablet

CAUTIONARY AND ADVISORY LABELS 3

▶ Naratriptan (Non-proprietary)

Naratriptan (as Naratriptan hydrochloride) 2.5 mg Naratriptan

2.5mg tablets | 6 tablet P £24.55 DT = £6.67 | 12 tablet P £30.00–£46.00

▶ Naramig (GlaxoSmithKline UK Ltd)

Naratriptan (as Naratriptan hydrochloride) 2.5 mg Naramig

2.5mg tablets | 6 tablet P £24.55 DT = £6.67

Rizatriptan

l INDICATIONS AND DOSE

Treatment of acute migraine

▶ BY MOUTH

▶ Adult: 10 mg, dose to be taken as soon as possible after

onset, followed by 10 mg after 2 hours if required, dose

to be taken only if migraine recurs (patient not

responding to initial dose should not take second dose

for same attack); maximum 20 mg per day

DOSE ADJUSTMENTS DUE TO INTERACTIONS

▶ Manufacturer advises reduce dose to 5 mg with

concurrent use of propranolol.

l UNLICENSED USE Not licensed for use in elderly.

l CONTRA-INDICATIONS Coronary vasospasm . ischaemic

heart disease . peripheral vascular disease . previous

cerebrovascular accident. previous myocardial infarction . previous transient ischaemic attack . Prinzmetal’s angina . severe hypertension . uncontrolled hypertension

l CAUTIONS Conditions which predispose to coronary artery

disease . elderly

l INTERACTIONS → Appendix 1: rizatriptan

l SIDE-EFFECTS

▶ Common or very common Alertness decreased . asthenia . diarrhoea . dizziness . drowsiness . dry mouth . dyspepsia . feeling abnormal . headache . insomnia . musculoskeletal

stiffness . nausea . pain . palpitations . sensation abnormal .throat complaints . vasodilation . vomiting

▶ Uncommon Angioedema . arrhythmias . ataxia . disorientation . dyspnoea . face oedema . hyperhidrosis .

480 Pain BNF 78

Nervous system

4

hypertension . muscle weakness . myalgia . nervousness . skin reactions . syncope .taste altered .thirst.tongue

swelling .tremor. vertigo . vision blurred

▶ Rare or very rare Hypersensitivity . stroke . wheezing

▶ Frequency not known Colitis ischaemic . myocardial

infarction . myocardial ischaemia . peripheral vascular

disease . seizure . serotonin syndrome .toxic epidermal

necrolysis

SIDE-EFFECTS, FURTHER INFORMATION Discontinue if

symptoms of heat, heaviness, pressure or tightness

(including throat and chest) occur.

l PREGNANCY There is limited experience of using 5HT1-

receptor agonists during pregnancy; manufacturers advise

that they should be avoided unless the potential benefit

outweighs the risk.

l BREAST FEEDING Present in milk in animal studies—

withhold breast-feeding for 24 hours.

l HEPATIC IMPAIRMENT Manufacturer advises caution in

mild to moderate impairment; avoid in severe impairment

(no information available).

Dose adjustments Manufacturer advises dose reduction to

5 mg in mild to moderate impairment.

l RENAL IMPAIRMENT Avoid in severe impairment.

Dose adjustments Reduce dose to 5 mg in mild to moderate

impairment.

l DIRECTIONS FOR ADMINISTRATION Rizatriptan

orodispersible tablets should be placed on the tongue,

allowed to disperse and swallowed. Rizatriptan oral

lyophilisates should be placed on the tongue and allowed

to dissolve.

l PATIENT AND CARER ADVICE Patients or carers should be

given advice on how to administer rizatriptan

orodispersible tablets and oral lyophilisates.

Driving and skilled tasks Drowsiness may affect

performance of skilled tasks (e.g. driving).

l MEDICINAL FORMS There can be variation in the licensing of

different medicines containing the same drug.

Orodispersible tablet

CAUTIONARY AND ADVISORY LABELS 3

EXCIPIENTS: May contain Aspartame

▶ Rizatriptan (Non-proprietary)

Rizatriptan (as Rizatriptan benzoate) 5 mg Rizatriptan 5mg

orodispersible tablets sugar free sugar-free | 3 tablet P s

Rizatriptan (as Rizatriptan benzoate) 10 mg Rizatriptan 10mg

orodispersible tablets sugar free sugar-free | 3 tablet P £14.00 DT

= £5.08 sugar-free | 6 tablet P £19.75–£28.00

Tablet

CAUTIONARY AND ADVISORY LABELS 3

▶ Rizatriptan (Non-proprietary)

Rizatriptan (as Rizatriptan benzoate) 5 mg Rizatriptan 5mg tablets

| 3 tablet P £13.37 | 6 tablet P £26.74 DT = £26.74

Rizatriptan (as Rizatriptan benzoate) 10 mg Rizatriptan 10mg

tablets | 3 tablet P £13.37 DT = £4.17 | 6 tablet P £8.34–

£26.74

▶ Maxalt (Merck Sharp & Dohme Ltd)

Rizatriptan (as Rizatriptan benzoate) 5 mg Maxalt 5mg tablets | 6 tablet P £26.74 DT = £26.74

Rizatriptan (as Rizatriptan benzoate) 10 mg Maxalt 10mg tablets

| 3 tablet P £13.37 DT = £4.17 | 6 tablet P £26.74

Oral lyophilisate

CAUTIONARY AND ADVISORY LABELS 3

EXCIPIENTS: May contain Aspartame

▶ Maxalt Melt (Merck Sharp & Dohme Ltd)

Rizatriptan (as Rizatriptan benzoate) 10 mg Maxalt Melt 10mg

oral lyophilisates sugar-free | 3 tablet P £13.37 DT = £13.37

sugar-free | 6 tablet P £26.74 DT = £26.74 sugar-free | 12 tablet P £53.48

Sumatriptan

l INDICATIONS AND DOSE

Treatment of acute migraine

▶ BY MOUTH

▶ Adult: Initially 50–100 mg for 1 dose, followed by

50–100 mg after at least 2 hours if required, to be taken

only if migraine recurs (patient not responding to

initial dose should not take second dose for same

attack); maximum 300 mg per day

▶ BY SUBCUTANEOUS INJECTION

▶ Adult: Initially 6 mg for 1 dose, followed by 6 mg after

at least 1 hour if required, to be taken only if migraine

recurs (patient not responding to initial dose should

not take second dose for same attack), dose to be

administered using an auto-injector; not for

intravenous injection which may cause coronary

vasospasm and angina; maximum 12 mg per day

▶ BY INTRANASAL ADMINISTRATION

▶ Adult 18–65 years: Initially 10–20 mg, to be

administered into one nostril, followed by 10–20 mg

after at least 2 hours if required, to be taken only if

migraine recurs (patient not responding to initial dose

should not take second dose for same attack);

maximum 40 mg per day

Treatment of acute cluster headache

▶ BY SUBCUTANEOUS INJECTION

▶ Adult: Initially 6 mg for 1 dose, followed by 6 mg after

at least 1 hour if required, to be taken only if headache

recurs (patient not responding to initial dose should

not take second dose for same attack), dose to be

administered using an auto-injector; not for

intravenous injection which may cause coronary

vasospasm and angina; maximum 12 mg per day

▶ BY INTRANASAL ADMINISTRATION

▶ Adult 18–65 years: Initially 10–20 mg, dose to be

administered into one nostril, followed by 10–20 mg

after at least 2 hours if required, to be taken only if

headache recurs (patient not responding to initial dose

should not take second dose for same attack);

maximum 40 mg per day

l UNLICENSED USE Not licensed for use in elderly.

l CONTRA-INDICATIONS Coronary vasospasm . ischaemic

heart disease . mild uncontrolled hypertension . moderate

and severe hypertension . peripheral vascular disease . previous cerebrovascular accident. previous myocardial

infarction . previous transient ischaemic attack . Prinzmetal’s angina

l CAUTIONS Conditions which predispose to coronary artery

disease . elderly . history of seizures . mild, controlled

hypertension . pre-existing cardiac disease .risk factors for

seizures

l INTERACTIONS → Appendix 1: sumatriptan

l SIDE-EFFECTS

GENERAL SIDE-EFFECTS

▶ Common or very common Asthenia . dizziness . drowsiness . dyspnoea . feeling abnormal . flushing . myalgia . nausea . pain . sensation abnormal . skin reactions .temperature

sensation altered . vomiting

▶ Rare or very rare Hypersensitivity

▶ Frequency not known Angina pectoris . anxiety . arrhythmias . arthralgia . colitis ischaemic . coronary

vasospasm . diarrhoea . dystonia . hyperhidrosis . hypotension . myocardial infarction . nystagmus . palpitations . Raynaud’s phenomenon . seizure .tremor. vision disorders

SPECIFIC SIDE-EFFECTS

▶ Common or very common

▶ With intranasal use Epistaxis . nasal irritation .taste altered . throat irritation

BNF 78 Migraine 481

Nervous system

4

▶ With subcutaneous use Haemorrhage . swelling

SIDE-EFFECTS, FURTHER INFORMATION Discontinue if

symptoms of heat, heaviness, pressure or tightness

(including throat and chest) occur.

l ALLERGY AND CROSS-SENSITIVITY Caution in patients with

sensitivity to sulfonamides.

l PREGNANCY There is limited experience of using 5HT1-

receptor agonists during pregnancy; manufacturers advise

that they should be avoided unless the potential benefit

outweighs the risk.

l BREAST FEEDING Present in milk but amount probably too

small to be harmful; withhold breast-feeding for 12 hours

after treatment.

l HEPATIC IMPAIRMENT Manufacturer advises caution

(reduced pre-systemic clearance increases exposure);

avoid in severe impairment (no information available).

Dose adjustments ▶ With oral use Manufacturer advises

consider dose reduction to 25–50 mg in mild to moderate

impairment.

l RENAL IMPAIRMENT Use with caution.

l PATIENT AND CARER ADVICE

Driving and skilled tasks Drowsiness may affect

performance of skilled tasks (e.g. driving).

l EXCEPTIONS TO LEGAL CATEGORY

▶ With oral use Sumatriptan 50 mg tablets can be sold to the

public to treat previously diagnosed migraine; max. daily

dose 100 mg.

l MEDICINAL FORMS There can be variation in the licensing of

different medicines containing the same drug.

Solution for injection

CAUTIONARY AND ADVISORY LABELS 3, 10

▶ Sumatriptan (Non-proprietary)

Sumatriptan (as Sumatriptan succinate) 12 mg per

1 ml Sumatriptan 6mg/0.5ml solution for injection pre-filled pen |

2 pre-filled disposable injection P £39.50 DT = £39.50

▶ Imigran Subject (GlaxoSmithKline UK Ltd)

Sumatriptan (as Sumatriptan succinate) 12 mg per 1 ml Imigran

Subject 6mg/0.5ml solution for injection syringe refill pack | 2 prefilled disposable injection P £48.49 DT = £48.49

Imigran Subject 6mg/0.5ml solution for injection pre-filled syringes

with device | 2 pre-filled disposable injection P £50.96 DT =

£50.96

Spray

CAUTIONARY AND ADVISORY LABELS 3, 10

▶ Imigran (GlaxoSmithKline UK Ltd)

Sumatriptan 100 mg per 1 ml Imigran 10mg nasal spray | 2 unit

dose P £14.16 DT = £14.16

Sumatriptan 200 mg per 1 ml Imigran 20mg nasal spray | 2 unit

dose P £14.16 | 6 unit dose P £42.47 DT = £42.47

Tablet

CAUTIONARY AND ADVISORY LABELS 3, 10

▶ Sumatriptan (Non-proprietary)

Sumatriptan (as Sumatriptan succinate) 50 mg Sumatriptan 50mg

tablets | 6 tablet P £31.00 DT = £2.90

Sumatriptan (as Sumatriptan succinate) 100 mg Sumatriptan

100mg tablets | 6 tablet P £40.18 DT = £2.99

▶ Imigran (GlaxoSmithKline UK Ltd)

Sumatriptan (as Sumatriptan succinate) 50 mg Imigran Radis

50mg tablets | 6 tablet P £23.90 DT = £2.90

Imigran 50mg tablets | 6 tablet P £31.85 DT = £2.90

Sumatriptan (as Sumatriptan succinate) 100 mg Imigran 100mg

tablets | 6 tablet P £51.48 DT = £2.99

Imigran Radis 100mg tablets | 6 tablet P £42.90 DT = £2.99

▶ Migraitan (Bristol Laboratories Ltd)

Sumatriptan (as Sumatriptan succinate) 50 mg Migraitan 50mg

tablets | 2 tablet p £4.44

Zolmitriptan

l INDICATIONS AND DOSE

Treatment of acute migraine

▶ BY MOUTH

▶ Adult: 2.5 mg, followed by 2.5 mg after at least 2 hours

if required, dose to be taken only if migraine recurs,

then increased if necessary to 5 mg, dose to be taken

only for subsequent attacks in patients not achieving

satisfactory relief with 2.5 mg dose; maximum 10 mg

per day

▶ BY INTRANASAL ADMINISTRATION

▶ Adult: 5 mg, dose to be administered as soon as

possible after onset into one nostril only, followed by

5 mg after at least 2 hours if required, dose to be

administered only if migraine recurs; maximum 10 mg

per day

Treatment of acute cluster headache

▶ BY INTRANASAL ADMINISTRATION

▶ Adult: 5 mg, dose to be administered as soon as

possible after onset into one nostril only, followed by

5 mg after at least 2 hours if required, dose to be

administered only if migraine recurs; maximum 10 mg

per day

DOSE ADJUSTMENTS DUE TO INTERACTIONS

▶ Manufacturer advises max. dose 5 mg in 24 hours with

concurrent use of moderate and potent inhibitors of

CYP1A2, cimetidine and moclobemide.

DOSE EQUIVALENCE AND CONVERSION

▶ 1 spray of Zomig ® nasal spray = 5 mg zolmitriptan.

l UNLICENSED USE Not licensed for use in elderly. Not

licensed for treatment of cluster headaches.

l CONTRA-INDICATIONS Arrhythmias associated with

accessory cardiac conduction pathways . coronary

vasospasm . ischaemic heart disease . moderate to severe

hypertension . peripheral vascular disease . previous

cerebrovascular accident. previous myocardial infarction . Prinzmetal’s angina .transient ischaemic attack . uncontrolled hypertension . Wolff-Parkinson-White

syndrome

l CAUTIONS Conditions which predispose to coronary artery

disease . elderly . should not be taken within 24 hours of

any other 5HT1-receptor agonist

l INTERACTIONS → Appendix 1: zolmitriptan

l SIDE-EFFECTS

GENERAL SIDE-EFFECTS

▶ Common or very common Abdominal pain . asthenia . chest

discomfort. dizziness . drowsiness . dry mouth . dysphagia . feeling hot. headache . limb discomfort. muscle

weakness . nausea . pain . palpitations . sensation

abnormal . vomiting

▶ Uncommon Tachycardia . urinary disorders

▶ Rare or very rare Angina pectoris . angioedema . coronary

vasospasm . gastrointestinal disorders . gastrointestinal

infarction . hypersensitivity . myocardial infarction . splenic infarction . urticaria

SPECIFIC SIDE-EFFECTS

▶ Common or very common

▶ With intranasal use Feeling abnormal . haemorrhage . myalgia . nasal discomfort.taste altered .throat pain

▶ With oral use Muscle complaints . sensation of pressure . throat complaints

▶ Rare or very rare

▶ With oral use Diarrhoea

SIDE-EFFECTS, FURTHER INFORMATION Discontinue if

symptoms of heat, heaviness, pressure or tightness

(including throat and chest) occur.

l PREGNANCY There is limited experience of using 5HT1-

receptor agonists during pregnancy; manufacturers advise

482 Pain BNF 78

Nervous system

4

that they should be avoided unless the potential benefit

outweighs the risk.

l BREAST FEEDING Use with caution—present in milk in

animal studies.

l HEPATIC IMPAIRMENT Manufacturer advises caution in

moderate to severe impairment (risk of increased

exposure).

Dose adjustments Manufacturer advises maximum 5 mg in

24 hours in moderate to severe impairment.

l DIRECTIONS FOR ADMINISTRATION Zolmitriptan

orodispersible tablets should be placed on the tongue,

allowed to disperse and swallowed.

l PATIENT AND CARER ADVICE Patients or carers should be

given advice on how to administer zolmitriptan

orodispersible tablets.

l MEDICINAL FORMS There can be variation in the licensing of

different medicines containing the same drug.

Spray

▶ Zomig (Grunenthal Ltd)

Zolmitriptan 50 mg per 1 ml Zomig 5mg/0.1ml nasal spray 0.1ml

unit dose | 6 unit dose P £36.50 DT = £36.50

Orodispersible tablet

EXCIPIENTS: May contain Aspartame

▶ Zolmitriptan (Non-proprietary)

Zolmitriptan 2.5 mg Zolmitriptan 2.5mg orodispersible tablets sugar

free sugar-free | 6 tablet P £20.35 DT = £10.54

Zolmitriptan 5 mg Zolmitriptan 5mg orodispersible tablets sugar

free sugar-free | 6 tablet P £20.35 DT = £13.44

▶ Zomig Rapimelt (Grunenthal Ltd)

Zolmitriptan 2.5 mg Zomig Rapimelt 2.5mg orodispersible tablets

sugar-free | 6 tablet P £23.99 DT = £10.54

Zolmitriptan 5 mg Zomig Rapimelt 5mg orodispersible tablets sugarfree | 6 tablet P £23.94 DT = £13.44

Tablet

▶ Zolmitriptan (Non-proprietary)

Zolmitriptan 2.5 mg Zolmitriptan 2.5mg tablets | 6 tablet P £19.15 DT = £9.00 | 12 tablet P £18.00–£32.98

Zolmitriptan 5 mg Zolmitriptan 5mg tablets | 6 tablet P £3.60

DT = £3.60 | 12 tablet P £7.20

▶ Zomig (Grunenthal Ltd)

Zolmitriptan 2.5 mg Zomig 2.5mg tablets | 6 tablet P £23.94 DT

= £9.00

6.2 Neuropathic pain

Neuropathic pain

Overview and management

Neuropathic pain, which occurs as a result of damage to

neural tissue, includes phantom limb pain, compression

neuropathies, peripheral neuropathies (e.g. due to Diabetic

complications p. 688, chronic excessive alcohol intake, HIV

infection p. 640, chemotherapy, idiopathic neuropathy),

trauma, central pain (e.g. pain following stroke, spinal cord

injury, and syringomyelia), and postherpetic neuralgia

(peripheral nerve damage following acute herpes zoster

infection (shingles)). The pain may occur in an area of

sensory deficit and is sometimes accompanied by pain that is

evoked by a non-noxious stimulus (allodynia).

Trigeminal neuralgia is also caused by dysfunction of

neural tissue, but its management is distinct from other

forms of neuropathic pain.

Neuropathic pain is generally managed with a tricyclic

antidepressant or with certain antiepileptic drugs.

Amitriptyline hydrochloride p. 372 [unlicensed indication]

and pregabalin p. 324 are effective treatments for

neuropathic pain. Amitriptyline hydrochloride and

pregabalin can be used in combination if the patient has an

inadequate response to either drug at the maximum

tolerated dose.

Nortriptyline p. 378 [unlicensed indication] may be better

tolerated than amitriptyline hydrochloride.

Gabapentin p. 315 is also effective for the treatment of

neuropathic pain.

Neuropathic pain may respond to opioid analgesics.

There is evidence of efficacy for tramadol hydrochloride

p. 471, morphine p. 463, and oxycodone hydrochloride

p. 466; however, treatment with morphine or oxycodone

hydrochloride should be initiated only under specialist

supervision. Tramadol hydrochloride can be prescribed when

other treatments have been unsuccessful, while the patient

is waiting for assessment by a specialist.

Patients with localised pain who are unable to take oral

medicines may benefit from topical local anaesthetic

preparations, such as lidocaine hydrochloride medicated

plasters p. 1352, while awaiting specialist review.

Capsaicin below is licensed for neuropathic pain (but the

intense burning sensation during initial treatment may limit

use). Capsaicin 0.075% cream is licensed for the

symptomatic relief of postherpetic neuralgia. A self-adhesive

patch containing capsaicin 8% is licensed for the treatment

of peripheral neuropathic pain in non-diabetic patients. It

should be used under specialist supervision.

A corticosteroid may help to relieve pressure in

compression neuropathy and thereby reduce pain.

Neuromodulation by spinal cord stimulation may be of

benefit in some patients. Many patients with chronic

neuropathic pain require multidisciplinary management,

including physiotherapy and psychological support.

Trigeminal neuralgia

Surgery may be the treatment of choice in many patients; a

neurological assessment will identify those who stand to

benefit. Carbamazepine p. 311 taken during the acute stages

of trigeminal neuralgia, reduces the frequency and severity

of attacks. It is very effective for the severe pain associated

with trigeminal neuralgia and (less commonly)

glossopharyngeal neuralgia. Blood counts and electrolytes

should be monitored when high doses are given. Small doses

should be used initially to reduce the incidence of sideeffects e.g. dizziness. Some cases respond to phenytoin

p. 323; the drug may be given by intravenous infusion

(possibly as fosphenytoin sodium p. 314) in a crisis

(specialist use only).

Chronic facial pain

Chronic oral and facial pain including persistent idiopathic

facial pain (also termed ‘atypical facial pain’) and

temporomandibular dysfunction (previously termed

temporomandibular joint pain dysfunction syndrome) may

call for prolonged use of analgesics or for other drugs.

Tricyclic antidepressants may be useful for facial pain

[unlicensed indication], but are not on the Dental

Practitioners’ List. Disorders of this type require specialist

referral and psychological support to accompany drug

treatment. Patients on long-term therapy need to be

monitored both for progress and for side-effects.

Other drugs used for Neuropathic pain Amantadine

hydrochloride, p. 418

ANALGESICS › PLANT ALKALOIDS

Capsaicin

l INDICATIONS AND DOSE

AXSAIN ®

Post-herpetic neuralgia

▶ TO THE SKIN

▶ Adult: Apply 3–4 times a day, dose to be applied

sparingly; important; after lesions have healed, not

more often than every 4 hours continued→

BNF 78 Neuropathic pain 483

Nervous system

4

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