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Methamphetamine

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Psychostimulant, Amphetamine
Methamphetamine
Desoxyn
Methamphetamine is a CNS stimulant of the amphetamine class. It is FDA-approved (as Desoxyn) for attention-deficit hyperactivity disorder and short-term management of obesity. It is a Schedule II controlled substance in the United States.

Experience

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Problems

ADHD in children, adolescents, and adults4.0n=1
Obesity (short-term) 1 don't know
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Titration strategies

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Effects

  • Attention and focus👤 no reports yet⚕️ no reports yet
  • Wakefulness👤 no reports yet⚕️ no reports yet
  • Motivation and drive👤 no reports yet⚕️ no reports yet
  • Mild euphoria👤 no reports yet⚕️ no reports yet
  • Decreased appetite/Anorexia👤 no reports yet⚕️ no reports yet
  • Dry mouth👤 no reports yet⚕️ no reports yet
  • Elevated heart rate / blood pressure👤 no reports yet⚕️ no reports yet
  • Insomnia👤 no reports yet⚕️ no reports yet
  • Irritability👤 no reports yet⚕️ no reports yet
  • Anxiety👤 no reports yet⚕️ no reports yet
  • Headache👤 no reports yet⚕️ no reports yet
  • Weight loss👤 no reports yet⚕️ no reports yet
  • Palpitations👤 no reports yet⚕️ no reports yet
  • Jaw clenching / bruxism👤 no reports yet⚕️ no reports yet
  • Stereotyped behaviors👤 no reports yet⚕️ no reports yet
  • Agitation👤 no reports yet⚕️ no reports yet
  • Psychosis👤 no reports yet⚕️ no reports yet
  • Mania👤 no reports yet⚕️ no reports yet
  • Dependence / misuse👤 no reports yet⚕️ no reports yet
  • Tolerance👤 no reports yet⚕️ no reports yet
  • Serious cardiac event👤 no reports yet⚕️ no reports yet
  • Seizure/Epileptic fit👤 no reports yet⚕️ no reports yet
  • Hyperthermia👤 no reports yet⚕️ no reports yet
  • Serotonin syndrome👤 no reports yet⚕️ no reports yet
  • Withdrawal/Discontinuation Syndrome👤 no reports yet⚕️ no reports yet

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Pharmacokinetics

Metabolism

Hepatic metabolism includes N-demethylation to amphetamine (an active metabolite).

Elimination

Urinary elimination is pH-dependent.

Pharmacodynamics

Methamphetamine acts at monoaminergic terminals as a releasing agent via TAAR1 agonism, VMAT2 substrate activity, and DAT/NET reverse transport. Secondary mechanisms include weak monoamine reuptake inhibition.

Interactions

  • MAOIs, contraindicated (per label)
  • Acidifying agents, increase urinary clearance
  • Alkalinizing agents, decrease urinary clearance
No interactions reported yet.

Pregnancy and lactation

Category C per Desoxyn label.

Relevant anecdote

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Relevant Literature

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See also

Mixed amphetamine salts, Dextroamphetamine, Lisdexamfetamine, Methylphenidate, Dexmethylphenidate, Modafinil

References

Structure of Methamphetamine
Summary
Classes
Psychostimulant, Amphetamine
Pharmacy
Starting dose
5 mg PO
Preparations
Desoxyn 5 mg tabs
US FDA Max
25 mg/day (ADHD per Desoxyn label); 15 mg/day (obesity, short-term, per Desoxyn label)
Pharmacology
Routes
Oral (prescribed)
Pregnancy
Category C (per Desoxyn label)
Legal status
Schedule II
Purported mechanism
Monoamine releasing agent, TAAR1 agonism, VMAT2 substrate, DAT/NET reverse transport