Provigil 200 mg is an oblong white tablet printed with “PROVIGIL” on one side and “200 mg” on the other side and is used to treat narcolepsy(sleep disorder), obstructive sleep apnea, or shift work disorder. It is considered a first-choice medicine for decreasing sleepiness in people with this condition. It goes to the central nervous system and affects areas in the brain that control attention and wakefulness. This medicine has benefits as well as side effects. If you are pregnant or breastfeeding don’t use this medicine during this time. Also if you have kidney disease, liver disease, or any allergic problem you can’t use this medicine. The patients may face some common and serious side effects while taking Provigil 200 mg like- allergic reactions like skin rash, swelling of the face, chest pain, breathing problems, vomiting, fever, headache, diarrhea, etc, and serious side effects like serious allergic reaction, severe rash, heart problem, mental health effect.