Taking amoxicillin for sinus infection. can i still take tylenol (acetaminophen) cold severe for adults?

Yes!: Just be sure to follow the dosing directions on the box.

Yes.: If no other health issues, yes. No important interactions. http://www.drugs.com/mtm/tylenol-cold-flu-severe.html

Sinus infection: Yes - the amoxicillin will kill bacteria the Tylenol (acetaminophen) cold severe will serve as a decongestant/anti histamine. For decongestants I still prefer pseudoephedrine - available OTC but behind the counter. In your case there is no problem taking both amoxicillin and Tylenol (acetaminophen) cold severe.

Definitely, yes: Sinus bacterial infection is usually treated with antibiotic therapy and treatments include decongestants and pain medications like Tylenol (acetaminophen) or NSAIDs.