Methamphetamine is a highly regulated drug, and its use is restricted for medical purposes in some countries, including the United States. In these cases, it is available only by prescription and must be used under the supervision of a licensed healthcare provider.

In the United States, methamphetamine is a Schedule II controlled substance, which means it is legal for medical use but is tightly regulated due to its high potential for abuse and dependence. It is prescribed for conditions such as attention deficit hyperactivity disorder (ADHD) and obesity, but the dosage is carefully controlled to reduce the risk of addiction.

However, it’s important to note that even in cases where methamphetamine is legal for medical use, it is still a highly addictive drug with serious health risks. Therefore, its use should be closely monitored by a licensed healthcare provider.

It’s also worth noting that in some countries, such as Japan and South Korea, methamphetamine is classified as a prescription-only drug, but its use is still tightly regulated and monitored to prevent abuse and addiction.