Robert Tan, ., founder and director of the Houston-based OPAL Medical Clinic, which focuses on men’s health, has one explanation: “Public policy and public opinion have been based on people who use steroids in larger amounts,” he says. Tan, whose practice has been incorporating hormone replacement therapy for 15 years, says that in Texas, “every prescription is tracked by the DEA, so a lot of physicians are not comfortable. If I write a lot of steroids prescriptions, very soon they’ll be knocking down my door and looking at my records.”
Inhalation of butane can cause euphoria , drowsiness , narcosis , asphyxia , cardiac arrhythmia , fluctuations in blood pressure and temporary memory loss, when abused directly from a highly pressurized container, and can result in death from asphyxiation and ventricular fibrillation . It enters the blood supply and within seconds produce intoxication.  Butane is the most commonly misused volatile substance in the UK, and was the cause of 52% of solvent related deaths in 2000.  By spraying butane directly into the throat, the jet of fluid can cool rapidly to −20 °C (−4 °F) by expansion, causing prolonged laryngospasm .  " Sudden sniffer's death " syndrome, first described by Bass in 1970,  is the most common single cause of solvent related death, resulting in 55% of known fatal cases. 
Some bodybuilders and athletes use trenbolone esters for their muscle-building and otherwise performance-enhancing effects.  Such use is illegal in the United States and many other countries. The DEA classifies trenbolone and its esters as Schedule III controlled substances under the Controlled Substances Act .  Trenbolone is classified as a Schedule 4 drug in Canada  and a class C drug with no penalty for personal use or possession in the United Kingdom .  Use or possession of steroids without a prescription is a crime in Australia .