Clindamycin
"Clindamycin (300 MG 4 x a day for 2  weeks) was prescribed for a very serious staph infection in my knee/bursitis. The pain and swelling began subsiding within 36 hours. Should be taken with a lot of water. Side effects include a little heartburn after taking the pills and a mild vaginal infection after 2 weeks, so lots of yogurt should be eaten to avoid this infection."