How many days after sex do you need to way to begin taking bactrium antibiotic safely?

It is generally recommended to wait at least 7 days after unprotected sex before starting antibiotics like Bactrim (sulfamethoxazole/trimethoprim) if you're concerned about a potential sexually transmitted infection (STI). However, if you experience symptoms or have specific concerns, it's best to consult a healthcare professional for personalized advice. Always follow your doctor's guidance regarding medication and treatment.