kidney infections
"I will not ever take this medication again (Generic form of Bactrim DS). I landed in the ER with a severe kidney infection... was given antibiotics, nausea medication, and pain medication through an IV. went home six hours later and started the Bactrim that night. I woke up at 2am absolutely drenched head to toe in sweat, with chills... couldn't  fall back asleep. The next day I had the worst headache... terrible, terrible pain in the base of my skull, and a horribly stiff and sore neck. Any time I stood up I could feel my blood pressure in my head sore, just throbbing. I had zero appetite. I stopped the Rx after 2.5 days. I felt worse after I started the Rx than before it. Never, ever again."