Promethazine Compound Linctus DESCRIPTION. Promethazine Compound linctus is clear, yellow syrup with raspberry flavour. It can relieve the symptoms associated with the common cold, allergies, hay fever, Promethazine may lead to impaired thinking or reaction time. Drinking alcohol could increase the side effects of this medication. It's also possible that serious side effects might result. In September 2009, the FDA required the manufactures of parenteral promethazine to include a boxed warning emphasizing the established risk of severe tissue necrosis, gangrene, or other tissue damage associated with the intravenous administration of the drug. By mouth. For Child 2–4 years. 5 mg twice daily, alternatively 5–15 mg once daily, dose to be taken at night. For Child 5–9 years. 5–10 mg twice daily, alternatively 10–25 mg once daily, dose to be taken at night. Promethazine is a first-generation antihistamine. It is used to treat allergies, trouble sleeping, and nausea. It may help with some symptoms associated with the common cold. It may also be used for sedating people who are agitated or anxious. Public Assessment Report. UKPAR. Phenergan Night Time 25 mg Film-coated Tablets (Promethazine hydrochloride) UK Licence No: PL 04425/0700. Aventis Pharma Limited (trading as Sanofi). Promethazine Hydrochloride reference guide for safe and effective use from the American Society of Health-System Pharmacists (AHFS DI). Promethazine hydrochloride Images. What does Promethazine hydrochloride look like? Note: Multiple pictures are displayed for those medicines available in different strengths, marketed under different brand names and for medicines manufactured by different pharmaceutical companies. Pictures of Phenergan (Promethazine), drug imprint information, side effects for the patient. Companies are required under Section 506C of the Federal Food, Drug, and Cosmetic Act (FD&C Act) (as amended by the Food and Drug Administration Safety and Innovation Act) to notify FDA of a permanent discontinuance of certain drug products, six months in advance, or if that is not possible, as soon as practicable.