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COMPOUNDS / STIMULANT / PSEUDOEPHEDRINE
STIMULANT

PSEUDOEPHEDRINE

MEDIUM RISK
BEST FOR:Decongestion●●●●●●●●○○8/10
PSEUDOEPHEDRINE · PSE · SUDAFED · PSEUDOEPHEDRINE HCL · D-ISOEPHEDRINE · ISOEPHEDRINE · PSEUDOEPHEDRINE HYDROCHLORIDE
DecongestantSympathomimeticStimulantOTCMethamphetamine precursor

Sympathomimetic amine used primarily as a nasal decongestant; mild CNS stimulant with structural similarity to amphetamine.

ROUTE / DOSAGE
LOW10mg
STANDARD60mg
HIGH120mg
Note: Max 240mg/day; immediate-release every 4-6h, extended-release 120mg every 12h
CYCLE
Every 4-6h as needed max 7 days continuous use
BIOAVAILABILITY
~100% oral
ACTIVE DURATION
4-6h (IR) 12h (ER) (subjective)
STORAGE
Room temperature dry away from light keep behind pharmacy counter per local regulations
HALF-LIFE
4-6h (up to 9-16h with alkaline urine) (plasma)
DURATION BREAKDOWN
Total4-6h (IR), 12h (ER)
Onset15-30min
Come up15-45min
Peak1-2h
Offset2-3h
After effects1-4h
Duration varies by route, dose, and individual. Source: community reports.
§ 01 — EFFECTS
7 documented
Nasal decongestion
Mild CNS stimulation
Increased alertness
Appetite suppression
Elevated heart rate
Increased blood pressure
Insomnia at higher doses
§ 02 — RISKS
Cardiovascular events including hypertension, arrhythmia, myocardial infarction and stroke
CNS overstimulation: anxiety, insomnia, tremor
Decreased milk production in lactating women
Potential for misuse and diversion to methamphetamine synthesis
Dangerous interaction with MAOIs (hypertensive crisis)
Rare but serious skin reactions including Stevens-Johnson syndrome
§ 03 — INTERACTIONS
Interaction data not yet available for this compound.
§ 04 — SCIENCE

Pseudoephedrine has robust evidence for short-term relief of nasal congestion associated with upper respiratory infections and allergic rhinitis. Its efficacy is well established for acute symptomatic use, though a 2024 narrative review suggested antihistamines may have a more favorable benefit-risk profile for common cold management. Evidence for weight loss or performance enhancement is limited and associated with significant cardiovascular risk. Pharmacovigilance data indicate rare but potentially life-threatening adverse cardiovascular and neurological events. Its role as a methamphetamine precursor has led to global regulatory restrictions on sales.

§ 06 — SOURCES
[1]
Pseudoephedrine-Benefits and Risks
pubmed.ncbi.nlm.nih.gov ↗
[2]
Pseudoephedrine - Drugs and Lactation Database (LactMed)
pubmed.ncbi.nlm.nih.gov ↗
[3]
Pharmacology of chlorphenamine and pseudoephedrine use in the common cold
pubmed.ncbi.nlm.nih.gov ↗
[4]
The impact of pseudoephedrine regulation at Australian pharmacies through Project Stop
pubmed.ncbi.nlm.nih.gov ↗
[5]
In search of an ideal drug for safer treatment of obesity: The false promise of pseudoephedrine
pubmed.ncbi.nlm.nih.gov ↗
[6]
Trends in Phenylephrine and Pseudoephedrine Sales in the US
pubmed.ncbi.nlm.nih.gov ↗
[7]
Pseudoephedrine hydrochloride causes hyperactivity in zebrafish via modulation of the serotonin pathway
pubmed.ncbi.nlm.nih.gov ↗
Disclaimer. Protokol.wiki is an informational reference. Nothing on this site is medical advice. Compounds listed may be unapproved, unregulated, or illegal in your jurisdiction. Consult a licensed physician before use. Data compiled from peer-reviewed literature.
METHODOLOGYCONTRIBUTECONTACT