Methamphetamine hydrochloride is found to have harmful effects to the brain. It changes how the brain functions. Studies have shown that methamphetamine abusers have reduced motor skills and impaired verbal learning as a result of alterations in the activity of the dopamine, a neurotransmitter involved in reward, motivation, experience of pleasure and motor function.
Street names: shabs, ice, meth, crystal, kristal, basura (PH), tawas (PH)
Other adverse effects of methamphetamine:
http://www.ddb.gov.ph/newsroom/46-sidebar/58-facts-on-drugs