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How long does it take for an allergic reaction to an antibiotic such as rash and face swelling to go away?

In: Conditions and Diseases, Medication and Drugs, Rashes, Skin Disorders, Antibiotics [Edit categories]

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Allergic reactions to Meds are tricky. Obviously its best to consult a Physician ASAP for their opinion. My daughter had a reaction to ammoxicilin and it took a few days for the swelling and rash to go away. The medicine stays in your system longer then you realize. Some people need steroids to reduce swelling and an antihistamine like Benydryl.

Its safe to say that you need to give it a few days for the fluid of the swelling to go away and back to normal.

Keep antihistamines in your purse (or if a guy, in your pocket or vehicle at all times.) Benadryl is the best and for adults two caps (25 mgs. each) are what you should take. It takes only 10 to 15 minutes for the swelling to go down, but if you've left it for a long time it may take longer. DO NOT DRIVE A VEHICLE OR MACHINERY WHILE TAKING ANTIHISTIMINES. Benadryl is given in hospitals (I know because I had a reaction to a medication) and is harmless to you. It will probably make you sleepy.

First answer by Marcy. Last edit by SmartMama3. Contributor trust: 1 [recommend contributor ]. Question popularity: 21 [recommend question].

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