Sominex Tablets

Sominex Tablets (16 tablets )

Order before 4pm for delivery from Sat. 25 Mar.

Description for Sominex Tablets

Sominex Tablets: If you are having temporary sleepless nights, try Sominex Tablets. They contain the active ingredient Promethazine Hydrochloride which is known to induce drowsiness and will help you go to sleep in a safe and effective manner. It should help you get 6-8 hours of quality sleep.

Product Information

  • Age: 16 years +

    Maximum per order: 2

  • Pregnancy: Not suitable

    Breastfeeding: Not suitable

Sominex Tablets: For relief of temporary sleepless nights, try Sominex Tablets. They contain the active ingredient Promethazine Hydrochloride which induces drowsiness and encourages 6-8 hours of sleep in a safe and effective manner.

Temporary insomnia is a common condition in the UK as stress and other problems often keep us awake at night. In most cases, the condition is temporary but if left untreated it can be troublesome. 

Sominex tablets contain the active ingredient promethazine, a sedating antihistamine. Promethazine causes drowsiness by effecting the brain; it decreases the time needed to fall asleep and increases deep sleep. Promethazine is helpful in the relief of temporary sleeping difficulties, for example if you have trouble falling sleep or staying asleep because of disturbances to your normal routine.

  • Take at bedtime, or up to an hour after going to bed if you are having difficulty falling asleep.
  • Take the tablets with a drink of water and either with or without food.

Sominex may cause drowsiness that can last up to 12 hours. If you are affected, do not perform potentially hazardous tasks such as driving or operating machinery. Avoid drinking alcohol while taking this medication.

This medication may interfere with some pregnancy tests, causing false negative or false positive results.

If you have scheduled any patch or skin prick tests to diagnose allergies, stop taking this medication at least 72 hours before your tests. Antihistamines can prevent or reduce the skin reactions that indicate an allergy.

Sominex tablets contain promethazine, a sedating antihistamine. Read on for advice about their use, warnings and side effects.


Adults, the elderly and children aged 16 years and over: 

Swallow 1 tablet at bedtime or up to 1 hour after going to bed when you're unable to fall asleep. 

These should only be taken orally. 

Avoid chewing or breaking the tablets, swallow them whole with plenty of water.

Not everyone will experience side effects when they take medication, however if you do they can include:


If you are concerned about these effects, or if the product affects you in any other way, stop using it and talk to your doctor or pharmacist.

Reading the following warnings carefully will help to ensure you are selecting an appropriate product.

  • Avoid driving or operating machinery including drinking alcohol, when taking this medication. 
  • Not recommended for children under 16 years of age. 
  • Keep out of reach and sight of children. 

Please read all packaging and the Product Information Leaflet before taking any new medicine and inform your doctor of medicines you are taking or intend to take.

The active ingredients contained in this medicine is/are:

Promethazine Hydrochloride Ph Eur 20mg.

The medicine also contains the following inactive ingredients to make up the complete product:

Croscarmellose sodium, lactose, magnesium stearate,maize starch.

Need to know more about Insomnia?

Visit our advice area or chat online to our support team

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