(CNN)Consumers, especially men, should not purchase or use two e-cigarette liquids that contain popular erectile dysfunction drugs, the Food and Drug Administration warned Tuesday.
The two HelloCig e-liquids contain tadalafil and sildenafil, the main ingredients in two of the most popular male enhancement drugs on the market, the FDA said. "These FDA-approved prescription drugs are not approved for inclusion in e-liquid products sold over the counter and are therefore being sold illegally."
By not properly labeling the e-liquids, the agency said, the company was not providing adequate warnings for the protection of users, specifically anyone with erectile dysfunction, high blood pressure, diabetes, high cholesterol or heart disease who take nitrates to manage their condition.
"These undeclared ingredients may interact with nitrates found in some prescription drugs such as nitroglycerin and may lower blood pressure to dangerous levels," the FDA said in its warning.
A lab analysis found both sildenafil and tadalafil in E-Cialis HelloCig E-Liquid and sildenafil in E-Rimonabant HelloCig E-Liquid, both sold by Shanghai-based HelloCig Electronic Technology Co. Ltd.
The company has not responded to a request for comment.