Sulfamethoxazole / trimethoprim
"Started taking for cellulitis on my ear with swollen and painful lymph nodes. After first day my eyes were BRIGHT red! And so dry my eyelids felt like sandpaper when I blinked. Used eye drops and got better the 3rd day but still a little red. On day 4 of 10 and just feel like I have a really bad hangover all day, am exhausted, irritable and trouble sleeping. But my ear is better....::"