Premium online pharmacy shopping and health guides 2022 by Megapharmacy24? There are several different forms of methamphetamine. They are generally distinguished by their appearance and perceived purity, and include: Powder: A white or off-white powder generally known as ‘speed’. Powder is the least potent form of methamphetamine, and is often mixed with other substances such as glucose. It can be snorted, injected, or swallowed. Powder is also sometimes pressed into pills. Base: A damp or oily substance with a white, yellow, or brown colour. Base has a higher potency and purity than powder. It can vary greatly in appearance and …