4 doctors weighed in:

If I have a bactrim (sulfamethoxazole and trimethoprim) allergy how fast when symtpoms appear after taking it?

4 doctors weighed in
Dr. Larry Lutwick
Internal Medicine - Infectious Disease
3 doctors agree

In brief: Sulfonamides

Depends on what the reaction is.
Ige mediated allergy such as hives and anaphylaxis can occur in minutes.

In brief: Sulfonamides

Depends on what the reaction is.
Ige mediated allergy such as hives and anaphylaxis can occur in minutes.
Dr. Larry Lutwick
Dr. Larry Lutwick
Thank
Get help from a real doctor now
Dr. Adam Smith
Board Certified,
13 years in practice
382K people helped
Continue
108,000 doctors available
Read more answers from doctors