Khat and cocaine are both stimulants, but they work differently in the brain and produce distinct experiences. The active chemical in khat, cathinone, is structurally and functionally closer to amphetamine than to cocaine. Both drugs boost dopamine levels, which is why they share some surface-level effects like euphoria and increased energy, but the way they achieve this, how long the effects last, and the risks they carry diverge significantly.
How They Work in the Brain
The key difference comes down to mechanism. Cathinone, khat’s primary stimulant compound, acts as a dopamine releaser. It forces nerve cells to push extra dopamine out into the spaces between neurons, flooding the brain with feel-good signals. Cocaine does the opposite mechanical trick: it blocks the recycling of dopamine back into neurons, so dopamine that’s already been released lingers longer than it should. Both approaches result in elevated dopamine, but the releasing mechanism makes cathinone behave more like amphetamine than cocaine at the cellular level.
Cathinone also affects norepinephrine (the brain’s alertness chemical) by blocking its reuptake, and it triggers some serotonin release, though at roughly one-third the potency of amphetamine for serotonin. In animal studies, rats trained to recognize cathinone’s effects responded similarly to both cocaine and methamphetamine, suggesting all three drugs produce overlapping subjective experiences despite their different mechanisms. Researchers found the three drugs produced parallel dose-response curves, pointing to a shared effect on dopamine neurons as the common thread.
The Experience: Timing and Duration
One of the starkest contrasts is how each drug is used and how quickly it hits. Khat is chewed, typically 100 to 500 grams of fresh leaves in a single session that stretches over several hours. The stimulant effects begin about 30 minutes after chewing starts and last roughly three hours. The first hour tends to produce the desirable effects: alertness, talkativeness, mild euphoria. After that, unpleasant effects creep in and can persist for hours, including restlessness, irritability, and insomnia.
Cocaine snorted nasally takes effect within minutes, with peak concentrations reached in about 60 minutes due to the drug’s own vessel-constricting properties slowing absorption. The high lasts only 30 to 60 minutes, which is why cocaine users frequently re-dose. This short, intense cycle is a major driver of cocaine’s compulsive use pattern. Khat’s slower onset and longer duration make sessions more of a prolonged social activity than a rapid hit-and-crash cycle.
Addiction and Dependence
Both substances can produce dependence, but the severity differs. When researchers applied standard psychiatric diagnostic criteria to khat chewers, about 31% met the threshold for dependence syndrome. Among those, 19% had tried to quit and failed, 13% reported escalating their use over time, and 17% experienced withdrawal symptoms.
Khat withdrawal looks like a milder version of stimulant withdrawal: depression, increased appetite, disrupted sleep, lethargy, bad temper, nightmares, and slight trembling. Many chewers report continuing their habit specifically to avoid these feelings. Cocaine withdrawal shares many of these features but is generally considered more intense, with stronger cravings and a more pronounced crash. The rapid on-off cycle of cocaine use reinforces compulsive behavior more aggressively than khat’s slow-release pattern.
Cardiovascular Risks
This is where the two drugs converge most dangerously. Both cathinone and cocaine raise heart rate and blood pressure and cause blood vessels around the heart to constrict. Habitual khat chewers show significantly higher heart rates and elevated diastolic blood pressure compared to non-users, with blood pressure changes tracking directly with cathinone levels in the blood.
The heart attack risk is striking. A hospital-based study in Yemen found that heavy khat users had a 39-fold increased risk of acute myocardial infarction compared to matched controls. Cathinone causes severe coronary vasoconstriction and weakens the heart muscle’s ability to contract, a combination that can trigger heart attacks through coronary spasm. Long-term use has been linked to heart failure. Cocaine carries well-documented risks of heart attack, cardiomyopathy, and stroke through similar mechanisms, and both drugs can cause these problems even in relatively young, otherwise healthy users.
Mental Health Effects
Khat use carries a meaningful psychiatric burden. A systematic review and meta-analysis found that khat users have a 122% increased prevalence of psychiatric symptoms compared to non-users. About 29% of khat users in the reviewed studies showed some form of psychiatric symptoms or disorder. The strongest association was with psychological distress, including stress, anxiety-like symptoms, and general mental suffering. Depression was also commonly reported.
More severe effects, including psychosis, have been documented, with some cases leading to suicide and homicide. However, the statistical link between khat and psychotic disorders specifically was weaker and not statistically significant in pooled analyses, suggesting psychosis is a less common outcome than general distress and depression. Cocaine-induced psychosis, by contrast, is a well-established phenomenon, particularly with heavy or binge use, and typically involves paranoia and hallucinations.
Oral Health: A Risk Unique to Khat
Because khat is chewed for hours at a time, it damages the mouth in ways cocaine does not. Long-term chewers face white lesions on the oral lining, gum disease, gum recession and bleeding, tooth staining, tooth loss, dry mouth, and jaw joint problems. The damage follows a dose-response pattern: the more you chew and the longer you’ve been chewing, the worse the outcomes. There is also a suggested link between chronic khat chewing and oral cancer, though this remains under investigation. Cocaine users who rub the drug on their gums can experience localized tissue damage, but the widespread oral destruction seen with khat chewing is a distinct consequence of the delivery method.
Legal Status in the United States
The legal treatment of these substances reflects how regulators view their medical utility and abuse potential. Cocaine is a Schedule II controlled substance, meaning it has high abuse potential but retains an accepted medical use (it’s still used as a topical anesthetic in certain nasal surgeries). Cathinone, khat’s primary active compound, is Schedule I, meaning it has no accepted medical use and high abuse potential. Cathine, a weaker stimulant also found in khat leaves, is Schedule IV. The khat plant itself is not explicitly scheduled, but because it contains cathinone, possessing fresh khat leaves is treated as possession of a Schedule I substance.
How Similar Are They, Really?
Khat and cocaine occupy the same broad category of central nervous system stimulants, and they share real dangers, particularly to the heart. But calling khat “like cocaine” oversimplifies the comparison. Cathinone is pharmacologically closer to amphetamine: it releases dopamine rather than blocking its reuptake. The experience of using khat, chewing leaves slowly over hours in a social setting, bears little resemblance to the short, intense high of snorted cocaine. The addiction profile is less severe, though dependence is real and withdrawal symptoms are well-documented. The cardiovascular risks, however, are alarmingly similar, and heavy khat use can be just as dangerous to the heart as cocaine.