I don't know for sure, but I think maybe Not. I'm pretty sure Keflex is a different drug from Penicillin, but I also think it is closely related. I read up on Keflex almost 10 years ago and I remember thinking it's like a super Penicillin. That was my non doctor understanding of Keflex. So before you take it ask as many pharmacists and docs as you can. And even if they all say yes it is ok to take, I say take very little to start. A very small dose will mean a small allergic reaction. The bigger the dose, the worse of a reaction you can have.
Keflex is a cephalosporins drug and there have been instances of cross allergies between the two drugs. If you are allergic to penicillin it is usually best to avoid Keflex too.
Hey HW5, Thor is right. It's like a cousin to penicillin. A lot of doctors will have you try it anyway. Both my husband & I are allergic to pennicillian (hives) & both to Keflex. I get a really bad itchy rash, & he is more intolerant as it makes him sick to his stomach. ...
Penicillin is a "cillin" and Keflex is a cephalosporin. 10% of patients who are allergic to Penicillin will also have a reaction to Keflex.
I hope this helps...
- Keflex Information for Consumers
- Keflex Information for Healthcare Professionals (includes dosage details)
- Side Effects of Keflex (detailed)
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
Updated 24 Jun 2018 • 3 answers
Updated 11 Feb 2014 • 2 answers
Updated 7 Dec 2015 • 1 answer
Updated 29 Jan 2017 • 1 answer
Updated 16 Dec 2017 • 1 answer