How long does it take before amoxicillin makes you feel better from a sinus infection?

Amoxicillin is an antibiotic that is used to treat bacterial infections, including sinus infections. It works by killing or stopping the growth of bacteria. Most people start to feel better within 2 to 3 days of starting amoxicillin, but it is important to take the medication for the full course prescribed by your doctor to ensure that the infection is completely cleared. If your symptoms do not improve after 3 days of taking amoxicillin, or if they get worse, you should contact your doctor.