Periactin tablets 30s periactin tablets 30s prevents discomfort caused by allergic reactions. It acts as an antihistamine to calm the bodys natural reaction to foreign substances like flower pollen, dust, mould, or pet dander. This medication has a drowsy effect and should not be taken before driving, using machinery, or any other activity that requires your complete attention. Relieves symptoms hayfever hives insect bites or stings food allergies nettle rashes itching caused by chickenpox or eczema this product is not eligible for returns ingredients what are the active ingredients cyproheptadine hydrochloride ingredients warnings precautions to consider before taking periactin may cause drowsiness, blurred vision or dizziness, if affected must not drive or operate machinery. Do not drink alcohol whilst taking this medication warnings