The Food and Drug Administration (FDA) and Drug Enforcement Administration (DEA) on Tuesday issued warnings to two websites that the agencies said were illegally selling Schedule II stimulants, such as Adderall, without a prescription.

Both agencies said warning letters were sent to Kubapharm.com and Premiumlightssupplier.com for selling Adderall without a prescription and putting consumers at risk. These two websites have also not registered their online pharmacies, according to the government.

Websites were given 15 days to respond to the warning.

FDA Commissioner Robert Califf said, “This action underscores the FDA’s commitment to using all available regulatory and compliance tools to prevent online companies from illegally selling potentially harmful drug products to consumers.

“The illegal sale of prescription drug stimulants online puts Americans at risk and contributes to potential abuse, misuse, and overdose,” Califf said. “These particular types of online pharmacies also undermine our efforts to help consumers safely purchase legitimate prescription drugs over the Internet.”

As the FDA noted in its announcement, illegally marketed drugs are at risk of being counterfeit, expired, or contaminated when purchased. DEA Administrator Anne Milgram has pointed out that the safety and legitimacy of pills purchased from these sites cannot be trusted.

Consumers who purchased drugs from these sites were urged to discard the drugs and to stop making such purchases.

On Kubapharm’s website, the company states that it does not require a prescription for its drug purchases because it ships its products from “a jurisdiction that does not require a prescription.” The phone number listed on its website has a Cincinnati area code.

Premiumlightssupplier.com prominently states on its site that it does not require a prescription to transact medications. The site, which features a phone number with a San Francisco area code, claims to sell eight drugs that require prescriptions.