My mom is 85 and was diagonosed with acute sinusitis 5 days ago. She had a bad cough and woke up with a dry and throat and could barely talk. She began taking OTC CLARITIN and was given a prescription for amoxillian. We did not fill the prescription that dat, hoping that the CLARITIN would clear it up. The first day, her congestion and tightness loosened up and she thought she was improving. The 2nd day, she was very off balance when walking, and slept a lot that day. She is still sleeping a lot, still has plenty of cough. Her talking doesn't make sense and her balance and ability to walk or very poor. She began taking the amoxillian tonight, but wondered if this is normal or is something else going on.