Speed, the street name for amphetamine and methamphetamine, is produced through chemical reactions that convert legal precursor ingredients into powerful stimulant drugs. There are two main production routes, each starting from different raw materials and yielding slightly different products. Understanding these methods matters mostly for context: why cold medicine is sold behind the counter, why certain chemicals are tightly regulated, and why former meth labs are treated as hazardous waste sites.
The Two Main Production Routes
Illicit speed production follows one of two general paths, depending on the starting ingredient. The first starts with pseudoephedrine, a decongestant found in cold and allergy medications. The second uses an industrial chemical called phenyl-2-propanone, commonly known as P2P. Both routes involve multi-step chemical reactions that strip, rearrange, or add atoms to transform a legal substance into a controlled one.
The pseudoephedrine route is conceptually simpler. Pseudoephedrine’s molecular structure is nearly identical to methamphetamine, differing by a single oxygen atom. Removing that oxygen through a chemical reduction reaction converts the decongestant into the drug. Two popular reduction methods exist: one uses red phosphorus combined with hydriodic acid, and the other (sometimes called the Birch method) uses ammonia and a reactive metal like lithium stripped from batteries.
The P2P route is more complex, involving multiple steps to first synthesize P2P from precursor chemicals like benzaldehyde and other industrial solvents, then convert P2P into amphetamine or methamphetamine through additional reactions. This method has become more common in large-scale operations, partly because pseudoephedrine has become harder to obtain in bulk.
Why the Method Matters for Potency
The production route directly affects the drug’s strength. Methamphetamine exists in two mirror-image forms, called d-methamphetamine and l-methamphetamine. The pseudoephedrine method predominantly produces d-methamphetamine, which is the potent, psychoactive form. The P2P method typically produces a 50/50 mix of both forms unless extra purification steps are taken.
The difference between these two forms is dramatic. Research published in the Journal of Neural Transmission found that d-methamphetamine’s stimulant effects are at least 10 times stronger than l-methamphetamine’s. At equivalent doses, d-methamphetamine caused dose-dependent increases in activity and repetitive behaviors in animal studies, while l-methamphetamine produced essentially no stimulant effect at all. The reason comes down to how each form interacts with the brain’s dopamine system: d-methamphetamine is roughly 17 times more potent at triggering dopamine release and 42 times more potent at blocking dopamine reuptake compared to its mirror image.
L-methamphetamine is so weak as a stimulant that it’s actually the active ingredient in some over-the-counter nasal decongestant inhalers. If a forensic lab finds l-methamphetamine in a sample supposedly from a prescription (which contains only d-methamphetamine), that’s a clear sign the drug was made illicitly, likely via the P2P route.
How Precursor Chemicals Are Regulated
The Combat Methamphetamine Epidemic Act of 2005 reshaped how Americans buy cold medicine. Under this law, pseudoephedrine products must be stored behind the counter or in a locked cabinet. Purchasers are limited to 3.6 grams per day and 9 grams per month, must show government-issued photo ID, and must sign a logbook that retailers keep for at least two years.
These restrictions pushed large producers toward the P2P method, which in turn prompted regulators to expand their list of controlled precursors. In 2021, the DEA designated a chemical called MAPA (methyl alpha-phenylacetoacetate) as a List I controlled substance because clandestine labs were using it to manufacture P2P, which is itself used to make amphetamine and methamphetamine. Chemical mixtures containing any amount of MAPA are now subject to the same tracking and reporting requirements as other controlled precursors. Handlers need registration, must report suspicious orders, and face criminal penalties for diversion.
The Toxic Waste Problem
Speed production generates an enormous amount of hazardous waste. For every pound of methamphetamine produced, roughly five pounds of toxic byproducts are left behind. These aren’t mild irritants. Unpublished studies cited in Environmental Health Perspectives measured the gases released during cooking and found alarming concentrations: phosphine gas reached three times the occupational short-term exposure limit, hydrogen chloride fumes exceeded three times the level considered immediately dangerous to life or health, and ammonia (which causes fluid buildup in the lungs) also hit three times its life-threatening threshold.
This waste doesn’t stay contained. It soaks into carpets, drywall, ventilation systems, and soil. Properties where meth was manufactured often require professional decontamination before they can be safely occupied again, and in many states, sellers are legally required to disclose if a home was ever used as a meth lab. The environmental footprint extends beyond the building itself. Waste is frequently dumped in nearby woods, fields, or waterways, contaminating soil and groundwater.
A Brief History of Speed Production
The chemistry behind speed dates to the late 1800s. In 1885, Japanese chemist Nagai Nagayoshi isolated ephedrine from the ephedra plant, which had long been used to treat asthma and other breathing conditions. Eight years later, he synthesized methamphetamine from ephedrine. In 1919, Akira Ogata developed a method to produce methamphetamine in crystalline form, creating what is considered the first known formula for crystal meth.
For decades, amphetamines were manufactured legally and prescribed widely, used by soldiers in World War II to stay alert and by civilians as diet pills and antidepressants. As abuse potential became clear through the 1960s and 1970s, regulations tightened. Illicit production shifted first to small home labs using the pseudoephedrine method, then increasingly to large-scale operations using the P2P route as precursor laws made pseudoephedrine harder to stockpile. Today, pharmaceutical-grade amphetamine (used in ADHD medications) is produced under strict quality controls that yield a pure, consistent product, while street speed varies wildly in purity and is identifiable by the unique contaminant profiles that each production method leaves behind.