Phenergan is an antihistamine. The drug is used to treat allergy symptoms such as itching, runny nose, sneezing, itchy or watery eyes, hives, and itchy skin rashes.

Provigil is a medication which helps to fight sleepiness in excess. The main cause of such sleepiness is narcolepsy or shift work disorder ( usually happens during working hours, when people experience excessive sleepiness or difficulty to