Colax PM Syrup is a mix medication utilized in the treatment of constipation This medication absorbs water hence makes the stool soft and easier to pass It also helps in the easy passage of gas Colax PM Syrup 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 diarrhea and stomach pain Most of these are temporary and usually resolve with time Contact your doctor straight away if you are at all concerned about any side effects Lifestyle modifications like having a fiber rich diet increase fluid intake and regular exercise can help you to get better aftereffects