15 Dianabol Side Effects Bodybuilders, Athletes, Male & Females Clenbuterol (often abbreviated "clen") is a synthetic sympathomimetic amine that belongs to the class of β₂‑adrenergic agonists.
15 Dianabol Side Effects Bodybuilders, Athletes, Male & Females Clenbuterol (often abbreviated "clen") is a synthetic sympathomimetic amine that belongs to the class of β₂‑adrenergic agonists.