Summary : In the U. S. , the governments Food and Drug Administration (FDA) must approve any drug before it can be sold. This is true whether its a prescription or an over-the-counter drug. The FDA evaluates the safety of a drug by looking at - Side effects - How its manufactured - Results of animal testing and clinical trials The FDA also monitors a drugs safety after approval. For you, drug safety means buying online from only legitimate pharmacies and taking your medicines correctly. 
Do you have information about Drug Safety