urinary tract infection
"Nitrofurantoin SURVIVAL KIT: LUBRICATING EYE DROPS.  Eyes will feel like there's sand in them. EAR PLUGS.  Everything you hear will irritate you & hurt your ears.  DVDs.  You won't be doing much but laying in bed. CAFFEINE IN A TABLET: Your head will feel like it's going to explode. This constricts blood vessles.  If all this fails, BENADRYL. Sleep it off....ADVANCED SURVIVAL: (not making recommendations. Saying what worked for me)  I split my Nitro Caps in half and spread total dose throughout day. Significantly less side-effects. Anything to reduce head pressure. I used a BetaBlocker & caffeine. BENADRYL !!!  The Tinnitus & stiff neck will go away.  It's a rough ride, but better than needing a kidney transplant.  Good luck my friends."