Methamphetamine is a synthetic drug and is not found naturally in any plant or animal source. It is produced through chemical synthesis in laboratories or clandestine settings using various precursor chemicals, including ephedrine or pseudoephedrine.

Ephedrine and pseudoephedrine, which can be found in certain plants such as ephedra, are used in the production of some cold and allergy medications, but these compounds are not naturally occurring in these plants. They are extracted or synthesized and then used in the production of the medication.

While some plants, such as ephedra, have been used for their stimulant effects in traditional medicine, these effects are typically attributed to other compounds present in the plant, rather than methamphetamine. Methamphetamine is a highly addictive and potent synthetic drug that can have severe physical and mental health consequences, and its use is illegal in most countries.