If you feel that your symptoms have been caused by a reaction to a medication, please call the office so this can be documented in your chart. If you are experiencing difficulty breathing or have the sensation of swelling in your throat, please call 911 or go to the Emergency Room as soon as possible. For mild reactions such as a rash and/or itching, you can try over-the-counter medications such as Benadryl, Claritin, Zyrtec, or similar anti-histamine products.