While each symptom can be treated with a different active ingredient, several pharmacists prefer to treat multiple symptoms with combination products that contain several active ingredients. 

COMBINATION PRODUCTS 

According to the World Health Organization’s (WHO) criteria for the registration of fixed-dose combination pharmaceutical products, if a fixed-dose combination drug is meant to alleviate various symptoms of a disease state, these symptoms must usually appear concurrently at clinically appropriate duration and for a period that provides...