Allegra M Tablet is a mix medication utilized in the treatment of allergy symptoms such as runny nose stuffy nose sneezing watery eyes and congestion or stuffiness Allegra M Tablet is taken with or without food in a dose and duration as advised by the doctor The dose you are given will depend on your condition and how you respond to the medication You should keep taking this medication for as long as your doctor recommends If you stop treatment too early your symptoms may come back and your condition may worsen Let your healthcare team know about all other medications you are taking as some may affect or be affected by this medication The most common side effects are nausea diarrhea vomiting skin rash flu like symptoms and headache Most of these are temporary and usually resolve with time Contact your doctor straight away if you are at all concerned about any of these side effects This medication may cause dizziness and sleepiness so do not drive or do anything that requires mental focus until you know how this medication affects you Avoid drinking alcohol while taking this medication as it can worsen your sleepiness