Hello there, Thank you for your question. I would have liked to know for how long you are planning to take primolut. Primolut is a very commonly used drug to delay periods and as such has very less side effects. If you take it for a week to 10 days you may experience some breast tenderness or mild headaches. But these are not dangerous and as such there is not much you can do to avoid them. Try to use less salt in food during the time you take this medicine as the reason for bloating and breast tenderness to some extent is salt retention caused by Primolut. Other than that eat a healthy diet and stay away from junk and processed foods. Drink lots of water. Do not worry as it is quite safe generally. Hope this helps. Take care.