​As a general rule, it’s not a good idea to purchase Adderall online. While there are legitimate pharmacies that sell prescription drugs, there are many more illegal sites that claim to sell these drugs, often without the need for a prescription. Adderall bought from illicit pharmacies can be cut with dangerous chemicals. Adderall can already be addictive on its own, and this potential is heightened when it is cut with other drugs. You also run the risk of serious legal troubles if you buy drugs from these illicit sources.