| DRUG SCHEDULE | DEFINITION | TYPES | 
| I | Drugs that have no accepted medical use currently, and have high tendency for abuse. | 
 *Las Vegas categorized Marijuana under Schedule I although medical marijuana is legal. | 
| II | Considered as drugs with tendency for high abuse. Some are accepted for medical use; however, there are also chances of addiction or dependency with repeated use. These drugs are available with prescription; drugs are subjected to strict record keeping procedures. | 
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| III | Drugs have less potential for addiction or abuse, may also have accepted medicinal use. | 
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| IV | Drugs that have low chances of addiction or abuse, accepted for medicinal use. | 
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| V | Drugs that have low chanced or abuse, have limited addictive properties, and accepted for medical use. | 
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