Why do doctors give penicillin injections?

eliot asked the Naked Scientists: Hi Chris, I hope you are well. I always listen to your show on 702, the highlight of the week. When I was younger, whenever I visited the Dr with Cold or Flu type symptoms. The Dr would give me a intramuscular injection of Penicillin mixed with Benadryl. read more

Why do some doctors still give painful injections of antibiotics in the buttocks - My mother has had a sore on her buttocks for over 5 years now. She has been to the doctor before and was given antibiotics, but it still keeps coming back. read more