Celkeran 5mg Tablet should be taken empty stomach, or 1 hour before and 2 hours after a meal. But, try to have it at the same time every day for most benefits. This will depend on what you are being treated for and may change from time to time. You should take it exactly as your doctor has advised. Taking it in the wrong way or taking too much can cause very serious side effects. It may take several weeks or months for you to see or feel the benefits but do not stop taking it unless your doctor tells you to.