Last updated: 25th February, 2020 Phenergan Syrup is a medication used to treat conditions like vomiting, nausea, allergic symptoms such as itching, rashes, runny nose and also used as a short-term treatment option for treating sleep disorders. Get to know how Phenergan Syrup works, its side effects, precautions, and contraindications where Phenergan Syrup is not suggested. […]