Follow any instructions from your doctor.
Tell your doctor about any medicines you are taking. You may need to stop taking all or some of these before the test. This includes:
- All prescription medicines.
- Blood-thinning medicines (anticoagulants).
- Over-the-counter medicines such as aspirin or ibuprofen.
- Street drugs.
- Herbs, vitamins, and other supplements.
Follow any directions you are given for not eating or drinking before surgery. This includes coffee, water, gum, and mints. (If you have been instructed to take medicines, take them with a small sip of water.)