The answer to this question depends on the on-line pharmacy you are talking about. On-line pharmacies that are very large chains that are well known can be used to purchase prescription medications over the internet that are then sent to you by mail. These pharmacies still require a prescription from a physician before they will send you the drug. In some cases they are cheaper than buying the medications at one of the branch locations. There are some sites where you may be able to purchase prescription drugs without an actual prescription. You should not trust these sites as they are less likely to be regulated. There have been reports of faulty medications purchased over the internet in the past. The best thing you can do is just ask your doctor if there is a list of on-line mail based pharmacies that he or she trusts. Your doctor may even have an easy mechanism for your prescriptions to be automatically sent there so that you don't have to do anything but wait for your medications to come in the mail. This can be done by your primary care physician
or internal medicine doctor
) or whoever is routinely writing your prescriptions. I hope this answer is helpful.