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Posted November 14, 2014

FDA Warns Consumers Not to Buy or Use Muscle Enhancement Supplement

On November 13, 2014, the FDA advised consumers not to buy or use the muscle enhancement supplement Mayhem (Chaotic-Labz) because it was found to contain the undeclared drugs cyproheptadine and dexamethasone. These drugs can cause serious side effects and can interact with other medications.

Cyproheptadine is a prescription antihistamine used for the treatment of seasonal allergies. It can cause drowsiness and decreased mental alertness.

Dexamethasone is a corticosteroid that can cause changes in blood sugar and blood pressure, damage bones and muscles, cause psychiatric problems, and, when taken in high doses for a prolonged period of time, adrenal suppression.

Because abruptly discontinuing dexamethasone can cause withdrawal syndrome, consumers who have taken Mayhem should immediately consult with their health care provider to safely discontinue use.

Mayhem is promoted to increase appetite and muscle growth. It is sold on some websites, including www.chaoticlabz.com, and in some retail stores.

See ConsumerLab.com's Review of Muscle Enhancers for tests of related products.

See Related Warnings:

Recall: Arthritis and Muscle Pain Supplement Contains Prescription Drugs

FDA Warning on Supplement for Pain Relief

FDA Warns of Life-Threatening Side Effects and Withdrawal Symptoms from Two Arthritis, Muscle Pain Supplements

Dangerous Supplement Being Sold Under New Name

For more information about this recall, use the link below.