A number of OTC or proprietary, or ethical/semi-ethical drug products are perceived to be of higher (), efficacy, safety, and potency. Some buyers prefer to have () for high-priced brands, or the lower-priced drug products. Nowadays, drug manufacturers are heavily investing and pouring in more money to create demand for their products in drugstores, hospital pharmacies, industrial clinics, and even in groceries and supermarkets, trading and sari-sari stores.