The definition of "drug diversion" is not all-inclusive or all-encompassing, in the sense that it does not account for the potential of
any substance, chemical, formulation, molecule, medication, or "drug" in the broadest sense to be diverted from one individual to another; it is not exclusive to controlled substances, as even substances that are not "scheduled" (neither "controlled" per, regulated by, nor listed in the
Controlled Substances Act or related analogues and derivatives, which are regulated in the United States by the
Federal Analogue Act. Even medication sold
over-the-counter or
behind the counter can be diverted from one individual to another for purposes of
substance abuse, often for
recreational purposes and/or as a means of
self-medicating that have hitherto been improperly or insufficiently treated (perhaps due to not being "taken seriously" by medical providers) or due to a patient's inability to access primary health care services due to not being insured; specific to the U.S., many Americans neither have nor qualify for
health insurance coverage in any form. Perhaps most commonly, diversion serves to aid
clandestine chemistry and production of
methaqualone,
glutethimide,
ethinamate,
ethchlorvynol,
methyprylon. OTC medications that can be misused (used recreationally (depending on one's perspective) include
diphenhydramine,
doxylamine,
chlorpheniramine,
dimenhydrinate,
propylhexedrine,
dextromethorphan,
levmetamfetamine,
nicotine replacement therapy products, oral
caffeine dosage forms, vitamins, minerals, and dietary or nutritional
supplements. Medication containing the
sympathomimetic amines
ephedrine and
pseudoephedrine can be purchased without a prescription, albeit
behind the counter of the pharmacy upon showing ID, signing a log and
legal disclaimer, and not exceeding monthly purchase limits, as defined by the
Combat Methamphetamine Epidemic Act of 2005. Theoretically, prescription drugs defined as "
controlled substances" (i.e. prescription drugs regulated or "scheduled" by the
Controlled Substances Act) are the most likely to be misused or diverted. ==Commonly diverted drugs==