Antibiotics for 4 month old?

Kelsey • Happily married•Mommy to a sweet princess and 2 boys• One on the way•

Moms, I need advice. My 4 month old is sick with a cough and stuffy/runny nose. She was prescribed Amoxicillin, Rynex, and Prednisolone. Have any of you had any experience with these? I'm scared to give her these after reading about them. Advice?