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Sominex Tablets (16 Tablets)

Sominex Tablets (16 Tablets)

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Total: £4.59

Product Summary

Specifically designed to help induce a healthy night’s sleep, especially if you are having trouble drifting off due to stress, interruption to your normal sleeping routine, jet lag, or a change in lifestyle. Sominex helps to relieve occasional disturbances in your normal sleep pattern.


  • Use this medicine for short-term sleeping problems.
  • Adults, the elderly and children over 16: The recommended dose is one tablet at bedtime. This may be taken up to one hour before going to bed when you cannot go to sleep.
  • Do not use this medicine for more than 7 days in a row.
  • If natural sleep does not return within 7 days or you have repeated bouts of sleeplessness, talk to your doctor.
  • Do not give to children under 16 unless your doctor tells to.
  • Do not drink alcohol when using this medicine.


  • The active ingredient per tablet is promethazine hydrochloride 20 mg.
  • The other ingredients are lactose, maize starch, croscarmellose sodium, magnesium stearate.

Warnings and Restrictions

Always use this medicine exactly as described in this leaflet or as directed by your doctor.

  • Do not take if you are under 16 years old.
  • Do not use for more than seven days without medical advice.
  • Sominex can cause drowsiness. Do not operate heavy machinery.
  • Consumption of alcohol should be avoided.

Do not use Sominex if you:

  • are pregnant. Consult your doctor before taking any sleeping aid.
  • are allergic to promethazine or any of the other ingredients of this medicine
  • have an allergy to phenothiazine drugs (used to treat mental illness, severe nausea/vomiting or vertigo e.g. chlorpromazine, pericyazine)
  • have concussion, lightheadedness, drowsiness, dizziness or a recent head injury
  • have taken MAOIs (monoamine oxidase inhibitors) for depression within the last two weeks.

Taking other medicines

Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines, in particular:

  • other medicines which make you drowsy (e.g. sedatives or relaxants)
  • MAOIs (monoamine oxidase inhibitors) for depression
  • medicines which may give you a dry mouth or blurred vision (e.g. atropine or antidepressants)
  • medicines used to reduce/prevent seizures (e.g. in epilepsy). Sominex may affect the risk of seizure.
  • strong painkillers (e.g. codeine, morphine or buprenorphine)
  • medicines treating mental illness (e.g. promazine, flupentixol or haloperidol).

Other warnings

Pregnancy tests based on urine samples may give false positive or negative results if used when this medicine is taken.

Sominex should not be taken during the 3 days before taking an allergy skin test as this may lead to false-negative results.

Do not drink alcohol when using Sominex.


Patient Information Leaflet
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