Can you take keflex if have an allergy to pcn?

Keflex (cephalexin) belongs to a class of medications called cephalosporins, which are a type of beta-lactam antibiotics. Penicillin (PCN) is another beta-lactam antibiotic.

People who are allergic to penicillin may also be allergic to cephalosporins, including Keflex. If you have a history of a penicillin allergy, it is important to inform your doctor before taking Keflex or any other cephalosporin antibiotic.

Your doctor may recommend alternative antibiotics that are not related to penicillin or cephalosporins if you are allergic to penicillin.

Some of the symptoms of an allergic reaction to a beta-lactam antibiotic may include:

* Skin rash

* Hives

* Swelling of the face, lips, tongue, or throat

* Difficulty breathing

* Wheezing

* Chest pain

* Rapid heartbeat

* Dizziness

* Loss of consciousness

If you experience any of these symptoms after taking Keflex or any other cephalosporin antibiotic, it is important to seek medical attention immediately.