This can be attributed to the rise in testosterone levels that anabolic steroids can cause. Acne is a common side effect that approximately 50% of bodybuilders experience as a result of using anabolic steroids (25). Also, Dianabol and other anabolic steroids can be bought easily in Thailand, where they’re technically illegal to purchase without a prescription (being a class S controlled drug). A person who is addicted to anabolic steroids will want to keep using them despite experiencing unpleasant physical side effects. Is Dianabol legal in the United Kingdom? No, Dianabol is classified as a controlled substance in Canada and is therefore illegal to possess or sell without a prescription. Yes, Dianabol is a Schedule III controlled substance in the United States and is therefore legal to possess and sell with a prescription. Is Dianabol legal in the United States? For this reason, it is classified as a controlled substance in most countries, making it illegal to buy or sell without a prescription. Otherwise, it is best to stay away from this steroid altogether.