I was on Keflex for a mild/moderate bladder infection but stopped it 2 days later because of lower back pain and other widespread muscle pain. I am on Clamoxyl Duo Forte now and with very first pill feeling lower back pain again. I am wondering if this is normal. I have only taken antibiotics once before in last 6 years that I recall and have no experience with them. These 2 are not on the list of antibiotics that cause PN or other issues similar. I have to get rid of this infection but unsure what could be going on.

Has this happened to anyone else?

Thank U,
Aussie