Meth Street Names, and Whether Speed, Adderall, or Phentermine Is Meth

Street names for meth

Methamphetamine has more names than most drugs because it has more forms. The powder, the crystal, and the pill each picked up their own vocabulary, and regional slang layered on top. The names below are the ones that come up in New Jersey, in police reports, and in the DEA’s own methamphetamine fact sheet.

A name tells you what someone calls it. It does not tell you what is in it. Meth sold as any of these can be cut, and in the current supply it can be contaminated with fentanyl, which is the reason the emergency box above mentions naloxone on a page about a stimulant.

What “tweaking” means

Tweaking is the end stage of a run: days without sleep, the euphoria gone, paranoia and agitation in its place, skin picking, and a jittery hyperfocus on nothing in particular. It is the state families describe when they say a person “is not there.” It is also where the psychiatric risk concentrates: the odds of psychotic symptoms rise about fivefold during periods of methamphetamine use, and both psychosis and violent behaviour climb with the number of days used. And it is the point at which a crash is coming.

Is speed meth?

Sometimes. It depends on where you are standing.

In the United States, “speed” almost always means methamphetamine, usually the powder. In the United Kingdom and much of Europe, “speed” means amphetamine sulfate, a different drug that is sold as an off-white or pinkish powder, or a damp, gritty paste. An American reading a British forum, or the reverse, gets the wrong drug. Ask which one.

Speed is a word, not a substance. The same word covers two drugs, and the British one is far weaker as it is sold: the UK government’s Focal Point annual report put average user-level amphetamine sulfate purity between 5 and 12 percent across the decade to 2018, and at 11 percent in England and Wales in 2018. The rest, per Talk to Frank, is caffeine, ephedrine, sugars such as glucose, laxatives, talc or paracetamol.

Is Adderall meth?

No. It is a close relative, and the relationship is worth understanding precisely.

Adderall is a mix of amphetamine salts. Methamphetamine is amphetamine with one extra methyl group attached. That small change makes methamphetamine more lipid-soluble, so it crosses into the brain more rapidly, as a 2006 review in the Journal of Psychiatry and Neuroscience lays out. Smoked or injected, it reaches the brain fast enough to produce the immediate, intense rush the National Institute on Drug Abuse’s methamphetamine topic page describes. A study that compared the two directly in humans found similar behavioral effects and potencies, as a 2008 review in the Canadian Medical Association Journal notes, and a 2026 comparative review concludes that no gram-for-gram conversion between them is supported. The two are close relatives, not interchangeable, and much of the difference a user feels is form and route rather than milligram strength. Both drugs raise dopamine. Both are Schedule II. Both can be misused. They are not the same drug, and a person taking prescribed Adderall is not taking meth.

The confusion has a real basis, though, in three places. Prescription methamphetamine exists, as generic methamphetamine hydrochloride tablets, formerly marketed under the brand name Desoxyn. The tablets still marketed are approved only for ADHD in children 6 and older, the old short-term obesity indication is no longer on their labels, and they are almost never prescribed. Adderall misused at high doses produces a stimulant pattern that looks like a meth pattern from the outside. And counterfeit “Adderall” pills pressed by illegal labs have repeatedly been found to contain methamphetamine rather than amphetamine, which the DEA documents on its fake prescription pills fact sheet. Someone who thinks they are taking Adderall from a friend may in fact be taking meth.

Amphetamine vs methamphetamine, in one sentence

Same family, same receptors, same schedule; methamphetamine is more lipid-soluble and, smoked or injected, reaches the brain faster, and it is the form the illicit market makes.

Is phentermine speed?

Phentermine is the diet pill sold as Adipex-P and in generic form. It is chemically related to amphetamine and it is a stimulant, which is where the “speed” question comes from. It is also a much weaker one, with far less effect on dopamine, and the federal government classes it as Schedule IV rather than Schedule II. MedlinePlus keeps a plain-language phentermine page that covers its uses and cautions.

Two practical points. Phentermine can trigger a positive result on some amphetamine screening tests, an interference documented in a study that identified phentermine in ten of a hundred false-positive amphetamine screens, which a confirmatory lab test then sorts out; anyone taking it who faces a drug test should disclose it. And phentermine taken with other stimulants, or in more than the prescribed dose, carries the same cardiovascular risks the stronger drugs do. It is not speed. It is on the same shelf.

Why the names matter for families

People rarely announce a drug by its pharmacological name. A parent hears “Tina,” a partner sees a text about “going fast,” a roommate finds a baggie labeled “glass.” Knowing the vocabulary turns a private language into a plain one. It also stops a false alarm: a prescription bottle of amphetamine salts is not evidence of meth, and the person who says “it is just my Adderall” may be telling the truth. Our guide to what meth smells and looks like covers the physical signs, and the blue Adderall pill guide covers how to check a tablet against its imprint.

What detox looks like for meth or amphetamine

Stimulant withdrawal does not threaten the body the way alcohol or benzodiazepine withdrawal does. It threatens the mood. The crash brings days of heavy sleep, hunger, and a depression that can reach suicidal thinking, which is the reason clinicians want the first week supervised. There is no FDA-approved medication for stimulant withdrawal; contingency management, a structured reward program, is the standard of care in the 2024 ASAM/AAAP stimulant use disorder guideline, which also confirms that any medication for stimulant use disorder is used off-label. Our stimulant detox guide walks through the timeline. If someone is having thoughts of suicide, call or text 988.

In New Jersey

Under New Jersey law P.L.2017, c.28, fully insured New Jersey plans and the State Health Benefits and School Employees’ plans cannot require prior authorization for the first 180 days per plan year of in-network treatment your own physician, psychologist or psychiatrist finds medically necessary, and cannot run concurrent or retrospective medical-necessity review for the first 28 days of an in-network inpatient stay. Self-funded employer plans, Medicare and Medicaid are not covered by that rule, so verify with the plan. NJ FamilyCare covers the substance use continuum, from withdrawal management through outpatient care, with the level of care set by ASAM criteria and, for some levels, prior authorization. Our insurance guides go plan by plan.

Periscope Behavioral Health, which publishes this site, is opening a medical detox in Hammonton, Atlantic County, expected Summer 2027. For help independent of us, the state’s IME Addictions Access Center at 1-844-276-2777 screens NJ FamilyCare and uninsured residents and refers them to treatment. Until the Hammonton detox opens, the admissions line of our publisher, Periscope Behavioral Health, at (888) 313-3583, can talk through options in New Jersey and Florida, including facilities Periscope operates. What a plan covers depends on the plan and the facility’s network status.