Promethazine

Each tablet contains promethazine hydrochloride as the active substance. Other ingredients include lactose and magnesium stearate.  

Possible side effects include: 

• Very common: drowsiness, sleepiness, dry mouth. 
• Sometimes: dizziness, headache, blurred vision, constipation. 
• Rare: allergic skin reactions, palpitations, difficulty passing urine. 
• Very rare: serious hypersensitivity reactions. 

This medicine is not suitable if you are allergic to promethazine or any of the ingredients, have severe liver problems, are under 2 years old, have problems passing urine due to prostate problems, or have certain heart rhythm disorders. Extra care is needed if you are older, as you may be more sensitive to drowsiness or dizziness, or if you have liver or kidney problems, epilepsy, or prostate problems. It is not recommended during pregnancy or while breastfeeding unless your doctor considers it necessary. It may cause drowsiness or sleepiness, so do not drive or use machines if affected. It can also interact with sleeping tablets, sedatives, antidepressants, and some painkillers, so check with your doctor or pharmacist if you use other medicines.