Sulfamethoxazole / trimethoprim
"My first time on this medication, so far I'm not impressed. I'm on day 3 right now for a sinus infection and I still feel basically the same as I did the day I went in to see the dr, only my throat is incredibly MORE sore and I'm coughing when I wasn't before. Having trouble sleeping and I have no appetite. Hopefully I will see some improvement in the next day or two."