<s>[INST] i am pretty sure i have a sinus infection cause i have had it before , but i went to walgreens and bought some Alka-Seltzer plus severe sinus and cold , do u think that will work for me ,and it doesn t say night time but will it keep me awake? YYYY@YYYY [/INST] The medicine may give you some symptomatic relief. Depending on what's in it, it could keep you awake. Sinus/cold medicines may have decongestants which act like mild stimulants. They may also have antihistamines which often cause sleepiness. It would depend on specifically what's in the particular medicines you purchased. If you have a bacterial sinus infection, you will probably also need antibiotics. If you're having fevers, yellow or green discharge, and a lot of sinus pain and pressure, it could be bacterial. In that case see your doctor to confirm this and get a prescription for antibiotics. Hope this helps. </s>