This content is the opinion of Marie Savard, M.D. and does not necessarily reflect the opinion of Merck & Co., Inc.

Q.	What's the best way to help my doctor keep track of my allergies and drug side effects?
A.	Begin a running list, in chronological order, of all reactions you've experienced from medications, food, or any other substances (eg, bee venom or x-ray dye). Some side effects, such as an upset stomach from the antibiotic erythromycin, may simply be unpleasant. Others, such as going into shock after taking penicillin, may be life-threatening. Still others fall in between. Just make sure that no one prescribes a medication you already know gives you problems. In your list, include The date of the reaction Medication or other substance causing the problem Specific reactions that occurred Any treatment you were given The type of reaction may tell your doctor whether it's a potentially life-threatening allergy or simply a medication side effect. Now he'll be better able to determine the right medication for you (for a free allergy/reaction form to help you keep track of your history, click here). 20108875(2)-03/08-EBS-CON