What Are They?
If you're online and see a promotion, e-mail, or Web site that claims to sell prescription drugs, remember that many Internet pharmacies try to sell these without a valid prescription from a physician — an illegal activity in every State. Because not all online pharmacies are regulated, they may ship expired drugs, drugs that have not been stored properly, or even fake drugs. There have been cases where drugs ordered online turned out to be nothing more than dietary supplements, contained harmful doses of the wrong drug, or contained no medication at all.64 You should never attempt to purchase drugs without a prescription or take any drug unless directed by a doctor.
Any pharmacy that is willing to sell prescription drugs without a valid doctor's prescription is not taking into account the health and safety of the consumer.
Legitimate online pharmacies are certified by the National Association of Boards of Pharmacy (NABP), require a valid doctor's prescription, and carry the Verified Internet Pharmacy Practice Sites 
(VIPPS) logo. You should also see a doctor and have a personal check-up, because this is the best way to determine whether or not a prescription medication is needed for your ailment — and what type of medication is best for you. Regardless, you should never seek to acquire or take prescription drugs, no matter the source, unless you are being treated by a qualified medical doctor who prescribes the medicine.
Getting prescription drugs without a prescription is also illegal and may subject a person to arrest and prosecution. Regardless of how you acquire a prescription medication, using these types of drugs without a valid prescription and medical supervision is unsafe and illegal.
Bottom line: taking prescription drugs without a doctor's approval and supervision is always dangerous — and it can be addictive and even fatal.