Is It Safe To Take Metformin,Glipozide And Losartan Regularly?

My husband takes Metformin, Glipizide, Januvia, Losartan, Metoprolol & Crestor every day.He continuously is sneezing, runny nose. First thought it was a cold, but this has been going on for some time. Just did some research on your site and found Losartan describes these symptoms the best. Could this be a reaction to one of these drugs?