A medical prescription is required to buy prescription drugs and in U.S. the safety of prescription drugs is ascertained by FDA. Dentists, physicians, veterinarians and optometrists are authorized to write prescriptions. The prescriptions contain the instructions about appropriate methods of taking the drugs and the warnings of the side effects caused by the drugs. Prescriptions include warnings of allergies and other information which the patient should know before taking the drug. In some cases, over the counter drugs are used by patients which do not require care from medical professional and these are mostly low power drugs such as pain killers or vitamin supplements.

Most of the FDA approved drugs include high power drugs and herbal or natural drugs or minerals are not covered by FDA and therefore, to buy herbal drugs prescriptions are not required. Some patients require regular prescriptions for some drugs and they seek a medical exemption to get prescriptions. There are many patients mostly in their old age who require medicines regularly and they find it difficult to travel to medical stores. Most of the online pharmacies provide you many drugs of your need and you are not required to travel physically to medical stores to buy the drugs.