Sominex Tablets - 16
A night time sleep aid, 16 one a night tablets
Thornton & Ross
How does it work?
Sominex tablets contain the active ingredient promethazine, which is a type of medicine called a sedating antihistamine.
Promethazine enters the brain in significant quantities and causes drowsiness. It decreases the time taken to fall asleep and increases the depth of sleep. This makes it helpful for the temporary relief of sleeping difficulties, for example if you have difficulty going to sleep or staying asleep because of disturbances to your normal routine.
One tablet should be taken at bedtime or up to an hour after going to bed if you are having difficulty falling asleep.
What is it used for?
- Sleep aid for temporary relief of sleeping difficulties (insomnia) in adults.
- Do not use this medicine for longer than seven days without seeking medical advice from your doctor.
- This medicine may cause drowsiness that can last up to 12 hours. If affected you should not perform potentially hazardous tasks such as driving or operating machinery. You should avoid drinking alcohol when taking this medicine.
- This medicine may interfere with some pregnancy tests, causing false negative or false positive results.
- If you are due to have any skin prick tests to diagnose allergies you should stop taking this medicine at least 72 hours before the tests. This is because antihistamines can prevent or lessen the skin reactions that indicate an allergy, and so can make the test results unreliable.
Use with caution in
- Elderly people.
- Decreased kidney function.
- Decreased liver function.
- A condition called bronchiectasis in which there is persistent and progressive widening of the airways due to lung infections or lung disease, such as cystic fibrosis.
- Severe coronary artery disease (heart disease).
- Closed angle glaucoma.
- Blockage of the opening from the stomach into the intestines (pyloro-duodenal obstruction).
- Blockage of the drainage of urine out of the bladder (bladder neck obstruction), for example due to an enlarged prostate gland.
Not to be used in
- Children under 16 years of age.
- Reduced awareness, slow reactions or extreme drowsiness due to medicines or illness that reduce activity in the central nervous system (CNS depression).
- Comatose states.
- People who have taken a type of medicine called a monoamine oxidase inhibitor (MAOI) in the past 14 days.
- Rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption (Sominex tablets contain lactose).
This medicine should not be used if you are allergic to one or any of its ingredients. Please inform your doctor or pharmacist if you have previously experienced such an allergy.
If you feel you have experienced an allergic reaction, stop using this medicine and inform your doctor or pharmacist immediately.
Pregnancy and breastfeeding
Certain medicines should not be used during pregnancy or breastfeeding. However, other medicines may be safely used in pregnancy or breastfeeding providing the benefits to the mother outweigh the risks to the unborn baby. Always inform your doctor if you are pregnant or planning a pregnancy, before using any medicine.
- If you are pregnant you should not take this medicine without consulting your doctor first. This medicine should only be used during pregnancy if the expected benefit to the mother outweighs any potential risks to the developing baby. It should not be used during the last two weeks of a pregnancy, because if taken during this time it may cause irritability or excitement in the baby after birth. Seek further medical advice from your doctor.
- Small amounts of this medicine may pass into breast milk. This is not expected to be harmful to a nursing infant, but there is a risk that it may cause irritability or excitement in a newborn baby. If you are breastfeeding you should not take this medicine without seeking medical advice from your doctor first.
- This medication may cause drowsiness. If affected do not drive or operate machinery. Avoid alcoholic drink.
Medicines and their possible side effects can affect individual people in different ways. The following are some of the side effects that are known to be associated with this medicine. Just because a side effect is stated here does not mean that all people using this medicine will experience that or any side effect.
- Blurred vision.
- Difficulty passing urine (urinary retention).
- Dry mouth.
- Rash or itching.
- Loss of appetite.
- Awareness of your heartbeat (palpitations).
- Low blood pressure (hypotension).
- Abnormal movements of the hands, legs, face, neck and tongue, eg tremor, twitching, rigidity (extrapyramidal effects).
- Blood disorders.
- Increased sensitivity of the skin to sunlight (photosensitivity). If affected you should avoid sun lamps and direct sunlight while you are taking this medicine.
The side effects listed above may not include all of the side effects reported by the drug's manufacturer.
For more information about any other possible risks associated with this medicine, please read the information provided with the medicine or consult your doctor or pharmacist.
How can this medicine affect other medicines?
It is important to tell your doctor or pharmacist what medicines you are already taking, including those bought without a prescription and herbal medicines, before you start taking this medicine. Similarly, check with your doctor or pharmacist before taking any new medicines while taking this one, to ensure that the combination is safe.
The manufacturer states that this medicine should not be taken by anyone who is taking a type of antidepressant called a monoamine oxidase inhibitor (MAOI), eg phenelzine, tranylcypromine, isocarboxazid, or who has taken an MAOI in the previous 14 days.
There may be an increased risk of drowsiness if this medicine is taken with any of the following (which can also cause drowsiness):
- antipsychotic medicines, eg chlorpromazine
- barbiturates, eg phenobarbital
- benzodiazepines, eg diazepam, temazepam
- sedating antihistamines, eg chlorphenamine, brompheniramine, hydroxyzine
- sleeping tablets, eg zopiclone
- strong opioid painkillers, eg morphine, codeine, dihydrocodeine
- tricyclic antidepressants, eg amitriptyline.
There may be an increased risk of side effects such as dry mouth, constipation, difficulty passing urine or confusion if promethazine is taken with other medicines that have anticholinergic effects, such as the following:
- anticholinergic medicines for Parkinson's symptoms, eg procyclidine
- antispasmodic medicines, eg hyoscine
- certain antihistamines, eg brompheniramine, chlorphenamine
- certain antipsychotic medicines, eg chlorpromazine
- certain antisickness medicines, eg prochlorperazine, meclozine, cyclizine
- medicines for urinary incontinence, eg oxybutynin, flavoxate, tolterodine, propiverine, trospium
- muscle relaxants, eg baclofen
- MAOI antidepressants, eg phenelzine
- tricyclic antidepressants, eg amitriptyline.
This medicine may oppose the effect of betahistine.