Doxylamine is an antihistamine which works by blocking the action of a chemical messenger (histamine), thereby controlling nausea, vomiting, and dizziness. Pyridoxine (vitamin B6) is a form of vitamin B which possesses anti-nausea properties. Folic is also a form of vitamin B which provides essential nutrients.

Common side effects 
Sleepiness, Dizziness, Fatigue, Dryness in mouth, Constipation