If you’re planning on taking prenatal vitamins, it’s always better to discuss them with your doctor because you might not even need them. Any excess of vitamins or minerals can sometimes result in various side effects.  If you’re taking prenatal vitamins, you can take steps to prevent any side effects because you might face a few of them like any other supplement. - Take them regularly and in the dosage recommended by your doctor. - Keep yourself hydrated and take one glass of water whenever taking this supplement. - Make sure to take them after you’ve had a meal and not an empty stomach. - Don’t take other supplements when taking this one and if you’re on some medications, discuss them with your doctor first. - Try to have a well-balanced diet with fiber, prebiotics, and probiotics.  - If a specific brand isn’t suiting you, ask your doctor to change it.  - A pregnant woman taking prenatal vitamins might have it more difficult.