urinary tract infection
"I went to the dr with a pain in my left side. I was told I had a uti and perscribed nitro duration mono/Mac 100 mg 2x per day.  After taking this med I have had a constant headache, no appetite, I have stomach pains and I feel exhausted. I have no energy to do anything and with two boys that's not working well. I just called my dr to see if I could get on a different medication. The last time I had a uti the antibiotics I was on did not do this to me. I'm miserable! But glad to find this site. I was thinking I was developing a kidney infection. I'm thankful to know it's more likely a medication side effect."