Many may be very dangerous if used improperly. Take prescription medications only if they were prescribed to you personally. Never take someone else's medicine. Carefully follow the label instructions. Check with your pharmacist or healthcare provider if you have any questions.
Some medications are ineffective or have dangerous side effects when taken with other medications.
Discard old medications you are no longer using. A good way is to flush them down the toilet. Also discard any medication if you can no longer read its label. Never mix medications in the same container. Use child-resistant caps on all medicine containers.