Selegiline, also known as Deprenyl, is an MAO inhibitor originally approved as a prescription drug for Parkinson's disease

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A 1970s United States federal law reclassified multiple cognitive and psychedelic compounds overnight under controlled substance schedules

Adderall is composed of a pharmaceutical mixture of four distinct amphetamine salts

Methamphetamine is approved by the United States Food and Drug Administration under the brand name Desoxyn for ADHD and obesity

The United States Food and Drug Administration banned the dietary supplement stimulant DMAA in 2013 due to cardiovascular risks

Modafinil is classified as a Schedule IV controlled substance under United States federal drug regulations

The United States Food and Drug Administration removed picamilon from the dietary supplement market in 2015

The United States Food and Drug Administration banned ephedrine from dietary supplements in 2004

Ephedrine remains legally available behind pharmacy counters in the United States without a prescription for nasal congestion and asthma

Tianeptine is an antidepressant in Europe that binds to opioid receptors at elevated dosages

Adderall is classified as a Schedule II controlled substance in the United States

The United States Food and Drug Administration does not recognize piracetam as either an approved drug or a dietary supplement

Methylphenidate is classified as a Schedule II controlled substance in the United States and works primarily by inhibiting dopamine reuptake

The plant khat contains cathinone, a compound classified as a Schedule I controlled substance in the United States

Cocaine remains legally approved for specific medical applications in operating rooms in the United States

Physicians in European countries routinely prescribe piracetam as a pharmaceutical medication

The synthetic peptides Semax and Selank are registered and prescribed as standard pharmaceutical medicines in Russia

Sildenafil, marketed as Viagra, was originally developed to treat cardiovascular conditions including high blood pressure and chest pain

The United States FDA issued a warning letter to WHOOP regarding WHOOP's Blood Pressure Insights feature

Wearable features that provide medical diagnoses require FDA clearance, whereas non-diagnostic health monitoring is classified by the FDA as general wellness

WHOOP holds FDA 510(k) clearance for its on-device electrocardiogram feature