Phenazine Syrup used in the treatment of nausea and vomiting related to certain conditions like before/after surgery or motion sickness. It may also be used to treat allergic conditions such as rash, itching, and runny nose. Phenazine Syrup should be taken with or without food, but take it at the same time every day to get the most benefit. The dose and how often you take it depend on what you are taking it for. Your doctor will decide how much you need to improve your symptoms. You should take this medicine for as long as it is prescribed for you. If you miss a dose, take it as soon as you remember it. However, you should never take a double dose. Inform your doctor if your symptoms do not improve within 7 days of treatment. The most common side effects of this medicine include dry mouth, blur vision, headache, and feeling dizzy. If these bother you or appear serious, let your doctor know. There may be ways of reducing or preventing them. It makes skin more sensitive to sunlight. Use a sunscreen or wear protective clothing before going out. Before taking this medicine, let your doctor know if you have glaucoma or have asthma issues, or have high blood pressure. Inform your doctor if you are pregnant, or breastfeeding. Your doctor should also know about all other medicines you are taking as many of these may make this medicine less effective or change the way it works. Generally, it is advised to avoid alcohol while on treatment.