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Delayed Reaction to Penicilin



Is it possible to have a delayed reaction of about three or four weeks to penicilin or clindamycin? Reaction was itchy rash which subsided after three days.


Delayed drug reactions do occur but usually days and not weeks after taking the drug.  

3-4 weeks is not very likely.  

It was probably related to some other process. However, without more history it is difficult to ascertain to what.  

To be safe, I would recommend seeing a board certified allergist who has experience addressing drug reactions for further evaluation. 

For more information:

Go to the Allergies health topic, where you can:

Response by:

Jonathan   Bernstein, MD Jonathan Bernstein, MD
Associate Professor of Medicine
College of Medicine
University of Cincinnati