Generally yes, but be careful with the Excedrin product line, which has undergone significant expansion. "Regular" Excedrin is fine with Allegra-D, but any "cough & cold" type product may not be....
Hi. As long as your doctor gave you both, its fine. I take both, the doc gave them to me. They work in different ways. Ask your doc if you have any underlying health issues or if you worry. Good luck!