What Are White Crosses Drugs? Effects and Risks

“White crosses” is a street name for small, white, cross-scored tablets sold as stimulants, most commonly associated with amphetamine or amphetamine-like substances that surged in popularity from the 1960s through the 1980s. The name comes from the tablet’s appearance: a single score line on each side forming a cross or “X” shape. What made white crosses especially unpredictable was that the tablets sold under that name didn’t always contain the same active ingredient, and the risks they carry range from dangerously elevated blood pressure and heart rate to psychosis, stroke, and lasting brain changes.

What Was Actually in the Tablets

In their earliest and most notorious form, white crosses contained d-amphetamine, the same compound found in prescription stimulants used for attention deficit hyperactivity disorder. Amphetamine has a high abuse potential and can be neurotoxic, but its stimulant and euphoric effects made it a common target for illicit manufacturing and street sale.¹ During the 1970s and 1980s, however, a booming market in “look-alike” drugs meant that many tablets stamped to resemble amphetamine actually contained cheaper, legal stimulants. The most common substitutes were ephedrine and caffeine, sometimes alone and sometimes combined. Health authorities struggled for decades to control ephedrine, which functioned as an amphetamine look-alike, a methamphetamine precursor, and a dietary supplement ingredient all at once.²

This meant that a person buying “white crosses” on the street had no reliable way of knowing whether they were taking actual amphetamine, an ephedrine-caffeine blend, or something else entirely. The cross-scored tablet shape was easy to replicate, and the subjective stimulant effects of ephedrine-caffeine combinations were close enough to amphetamine that casual users often couldn’t tell the difference. That ambiguity is one of the central dangers of white crosses: the risks depend heavily on what’s actually in the pill, and the user rarely knows.

How They Affect the Body in the Short Term

Regardless of whether white crosses contain amphetamine or ephedrine-caffeine, the short-term effects follow a broadly similar pattern because all these compounds are sympathomimetics. They rev up the “fight or flight” branch of the nervous system. Users typically experience a rush of energy, suppressed appetite, increased alertness, elevated mood, and a sense of confidence or euphoria. Amphetamine in particular is abused worldwide for these euphoric and stimulant effects.³

Alongside those sought-after effects come the ones nobody is chasing: rapid heartbeat, jaw clenching, sweating, tremors, dry mouth, and difficulty sleeping. At higher doses or with repeated use, the stimulant push can tip into agitation, paranoia, and an uncomfortable “wired” feeling that users sometimes describe as a body buzz they can’t turn off. The cardiovascular and neurological systems take the brunt of the impact in overdose situations.⁴

Why the Ephedrine-Caffeine Combination Is Not a Safer Alternative

People who learned that their white crosses contained ephedrine and caffeine rather than amphetamine sometimes assumed they were getting a milder product. That assumption is wrong. The combination of ephedrine and caffeine produces stronger stimulant effects than either drug alone, a pattern researchers have documented across multiple studies.⁵ When the two are taken together, systolic blood pressure rises sharply, heart rate increases, and blood sugar and insulin levels spike. In controlled research, the combination raised systolic blood pressure by roughly 12 mmHg above placebo and increased heart rate by about 6 beats per minute.⁶

Those numbers may sound modest in a clinical setting, but street tablets don’t come with controlled dosing. A person taking multiple white crosses over a night out, or combining them with alcohol, is stacking cardiovascular stress with no safety net. The metabolic effects, including elevated free fatty acids and lactate, add further strain on a body already running in overdrive. Ephedrine alone increased heart rate and blood sugar but didn’t move blood pressure much; caffeine alone raised blood pressure but not heart rate. Together, they did both.⁶

Stroke and Cardiovascular Emergencies

The cardiovascular risks of white crosses go well beyond uncomfortable palpitations. Ephedrine has been linked to both ischemic stroke (caused by a blocked blood vessel in the brain) and hemorrhagic stroke (caused by bleeding in the brain). In documented cases, one patient developed a stroke in a deep brain structure after taking known amounts of ephedrine that had been purchased on the street as “speed” for weight loss. Two other patients died from intracranial hemorrhages after taking unknown quantities of the drug.⁷

Ephedrine is not unique in this respect. The broader class of sympathomimetic drugs found in stimulant pills and even some over-the-counter cold medications has been tied to stroke, sometimes after just a single dose. In a review of cases, stroke occurred after a single dose in the majority of patients.⁸ The mechanism is straightforward: these drugs constrict blood vessels and raise blood pressure, and if a vessel in the brain is already vulnerable, the sudden spike can cause it to rupture or clot off. Street doses, which are uncontrolled and often stacked through repeated use, amplify that risk dramatically.

Psychiatric Effects

Stimulant drugs in the amphetamine and ephedrine families don’t just stress the heart and blood vessels. They can profoundly disrupt mental health. An analysis of adverse event reports to the FDA found that the most commonly reported psychiatric effects of ephedra-containing products included psychosis, severe depression, mania or agitation, hallucinations, sleep disturbance, and suicidal thoughts.⁹ These aren’t effects limited to people with pre-existing psychiatric conditions; some occurred in individuals with no prior history of mental illness.

Amphetamine-induced psychosis is a particularly well-documented risk. The symptoms can closely mirror those of acute schizophrenia, including paranoid delusions, auditory hallucinations, and disorganized thinking. The encouraging finding is that amphetamine-induced psychosis tends to resolve faster and more completely than schizophrenic psychosis once the drug is stopped.¹⁰ But “tends to resolve” is not the same as “always resolves,” and a psychotic episode carries real danger in the moment, from self-harm, from impaired judgment, and from the terror the person experiences.

The psychiatric toll also extends to the crash that follows stimulant use. As the drug wears off, users often experience a rebound of fatigue, irritability, and low mood that can deepen into clinically significant depression. For someone who already struggles with depression or anxiety, even a single episode of stimulant use can destabilize weeks of progress.

What Happens to the Brain Over Time

Repeated exposure to amphetamines changes the brain’s physical structure. Imaging studies have consistently found lower cortical gray matter volume and higher striatal volume in people who abuse amphetamines compared to those who don’t.¹¹ Researchers debate whether some of these differences reflect pre-existing vulnerabilities that make a person more prone to addiction, or whether they are consequences of drug use itself. The higher striatal volumes might represent the brain’s attempt to compensate for toxic damage to dopamine-rich areas. Several forms of white matter abnormality are also common and may involve gliosis, which is essentially scarring in the brain’s connective tissue.¹¹

Animal research has provided a window into the biological mechanism. When rats were given continuous doses of amphetamine or methamphetamine over several days, they developed a selective depletion of dopamine in the striatum, a brain region critical for motivation, reward, and movement. That depletion was tied to actual degeneration of dopamine nerve fibers, suggesting the damage is not just chemical but structural.¹² Animal studies don’t map perfectly to human use, but the direction is clear: chronic amphetamine exposure puts the brain’s dopamine system under real physical strain.

Dependence and the Difficulty of Quitting

White crosses, whether they contain amphetamine or ephedrine, carry dependence risk. With amphetamine specifically, a Cochrane review noted that ongoing use can lead to dependence that is as hard to recover from as dependence on heroin or cocaine.¹³ That comparison surprises people who think of stimulants as somehow less “serious” than opioids, but the grip amphetamine dependence can have on a person’s daily functioning is severe.

Withdrawal symptoms during the first days of abstinence often include deep fatigue, increased appetite, vivid or disturbing dreams, slowed thinking, and depression. These symptoms can be intense enough to drive a person back to regular drug use. The same Cochrane review found that no medications have demonstrated significant effects over placebo in reducing acute amphetamine withdrawal symptoms.¹³ That’s a sobering gap in treatment options. Unlike opioid withdrawal, where medications can ease the transition, amphetamine withdrawal currently relies on behavioral support and time.

A large review of treatment approaches for stimulant use disorder found that contingency management, a system in which patients earn tangible rewards for drug-free urine tests and treatment attendance, was the only intervention with sufficient evidence to support its use. Pharmacological interventions including antidepressants, dopamine agonists, and even replacement stimulants were found to have insufficient evidence to recommend or rule out.¹⁴ The toolbox is thin, which makes prevention and early intervention all the more important.

The Modern Pill Landscape

White crosses in their original form are less commonly encountered today than they were in the 1970s and 1980s, partly because federal and state regulations eventually tightened access to ephedrine and partly because the illicit stimulant market has shifted. But the underlying danger of unverified street pills has not gone away; if anything, it has gotten worse. An ethnographic and drug-checking study of counterfeit pills sold at tourist-oriented pharmacies in Mexico found that roughly two-thirds of tablets sold as “Adderall” actually contained methamphetamine, and about 30% of tablets sold as “Oxycodone” contained fentanyl.¹⁵

This is the modern version of the look-alike problem. A person buying a pill that looks like a pharmaceutical product may be getting methamphetamine, fentanyl, or a combination of substances with wildly different potency and risk profiles. The fentanyl contamination risk is especially alarming because fentanyl is active at microgram doses and can cause fatal respiratory depression in quantities invisible to the naked eye. Someone expecting a stimulant effect from what they believe is an amphetamine tablet could instead receive a dose of a potent opioid for which they have no tolerance.

Drug Checking as a Practical Safety Measure

For people who are going to use stimulant pills regardless of warnings, drug checking services represent one of the more evidence-supported harm reduction tools available. These services allow users to submit a sample of their substance for chemical analysis before consuming it. Research in recreational settings has found that a high percentage of people who discover their drugs contain unexpected or unidentified substances choose not to take them.¹⁶

The value of drug checking extends beyond individual overdose prevention. Qualitative research with both clients and providers at harm reduction services found that drug checking can fill a regulatory vacuum left by prohibition, serving as a form of informal market regulation at the community level and feeding useful data into public health surveillance systems.¹⁷ When a particular batch of pills turns out to contain fentanyl or an unexpected substance, that information can be shared rapidly through community networks, potentially preventing a cluster of overdoses. Fentanyl test strips, which are cheap and portable, have become a front-line tool in this effort, though they can only tell you whether fentanyl is present, not what else might be in the pill.

How White Crosses Fit into Stimulant History

White crosses occupy a specific niche in the broader history of stimulant misuse. Amphetamine was widely available by prescription in the mid-twentieth century, used for everything from depression to weight loss to keeping soldiers alert during wartime. By the time street demand for cheap speed outstripped diverted pharmaceutical supply, underground manufacturers stepped in with look-alikes that exploited the lack of regulation around ephedrine. The cross-scored white tablet became a recognizable brand, ironically one with no quality control and wildly variable contents.

Ephedrine’s path through regulation was famously tortured. Despite decades of warnings about misuse, ephedrine and its herbal source, ephedra, were regulated in a piecemeal fashion and remained easily available to the public for most of the late twentieth century.² It was sold as a diet aid, a decongestant, an energy supplement, and a performance enhancer, all while also serving as the primary precursor chemical for manufacturing methamphetamine. The FDA didn’t ban ephedra-containing dietary supplements until 2004, and even then, pure ephedrine remained available in some pharmaceutical products. The Combat Methamphetamine Epidemic Act of 2005 finally placed retail restrictions on pseudoephedrine and ephedrine sales, requiring identification and purchase limits, but by that point the damage of decades of easy access had been done.

The white crosses era offers a useful lesson about what happens when stimulant demand meets an unregulated supply chain. The tablets were cheap, widely available, and carried a street reputation that outpaced any verified information about their contents. People who thought they were taking amphetamine were often taking ephedrine and caffeine. People who thought they were taking a mild diet pill were sometimes taking pharmaceutical-grade speed. And no one taking a white cross could know for certain what they were swallowing. That uncertainty, more than any single ingredient, was the defining risk of the drug, and it remains the defining risk of unregulated stimulant pills today.