Medical Questions > Antibiotics

Question 1:	What are antibiotics? Doctors seem to prescribe them all the time.
Question 2:	I keep hearing that there are more and more bugs becoming resistant to antibiotics. Just how many different antibiotics are there?
Question 3:	Why won' t a doctor give antibiotics for the flu?
Question 4:	I am allergic to penicillin. What other antibiotics can I use?
Question 5:	I have been prescribed an antibiotic called Keflex for my cystitis, but it gave me diarrhoea and I stopped it. i am also 6 months pregnant. Is this the right antibiotic to use?
Question 6:	I have been told that I am allergic to sulpha antibiotics, as I had a bad rash after taking Bactrim. With so many different antibiotic names, can you tell me which ones contain sulpha? Are they all yellow like normal sulpha?
Question 7:	Can you please tell me about the antibiotics called tetracyclines? I have often had these for my bronchitis, but my GP said they were too dangerous to use on my six year old son when he got bronchitis.