Although the effect of drugs is similar, the price difference is much. That's because different manufacturers have different brands, and the materials used in the production of drugs are different. Therefore, a penny for a penny, some people may add this medicine is better, some drugs are very common, or there are no more middlemen, direct supply. So the price will definitely be different. So big pharmacies will definitely be more expensive, because they also have to pay high taxes. Small pharmacies will definitely be cheaper because they pay less taxes. The wool is on the sheep, just like my idea, adopt it!