Here are some tips from the Food and Drug Administration on ways to safely use medication:
Make sure you understand the directions for using the drug; ask if you have questions or concerns.
Always double check that you have the right medicine.
Keep medicines in their original labeled containers, whenever possible.
Never combine different medicines in the same bottle.
Read and follow the directions on the label and the directions from your doctor, pharmacist, or other health care professional. If you stop the medicine or want to use the medicine differently than directed, consult with your health care professional.