This page describes pharmacological agents that may have legal restrictions, side effects, and drug interactions in your jurisdiction. Information is for educational research only — consult a clinician before considering any compound.
Solriamfetol
DNRI wakefulness drug from Axsome (acquired Sunosi from Jazz Pharma in 2022) — A-tier evidence in narcolepsy + OSA EDS, B-tier shift work,…
Aliases (6)
Overview
What is Solriamfetol?
Solriamfetol is a dopamine-norepinephrine reuptake inhibitor (DNRI) approved by the FDA in 2019 (brand name Sunosi) for excessive daytime sleepiness in narcolepsy and obstructive sleep apnea. It is a non-amphetamine wake-promoting agent.
Key Benefits
Improves wakefulness and reduces excessive daytime sleepiness in narcolepsy and OSA, with sustained effects through the day, lower abuse potential than amphetamines, and minimal cardiovascular impact at standard doses.
Mechanism of Action
Inhibits both the dopamine transporter (DAT) and norepinephrine transporter (NET), raising synaptic dopamine and norepinephrine in wake-promoting circuits (locus coeruleus, ventral tegmental area). Unlike amphetamines, it does not significantly cause vesicular monoamine release.
▸Brand options4 known
StatusSchedule IV (US DEA, 2019); Rx-only most jurisdictions
Research Indications
~95% renal excretion as unchanged drug
minimal CYP metabolism, so very few liver-mediated drug interactions. Renal impairment matters: half-life extends 1.2× / 1.9× / 3.9× in m…
Research Protocols
Disclaimer: These are commonly discussed research protocols and not medical advice.
Peptide Interactions
200 mg AM: Tempers norepinephrine-driven anxiety/BP without blunting wake-promotion. Most-recommended adjunct.
200-400 mg AM: BP buffer + anxiety reduction.
250-500 mg AM: PFC acetylcholine support pairs well with the DA/NE drive — anecdotal cognitive synergy.
14-day washout BOTH directions REQUIRED. Hypertensive crisis + serotonin syndrome risk. Includes selegiline at higher doses (>10 mg/day, where MAO-A selectiv…
Additive sympathomimetic load → BP + HR + anxiety stacking. Avoid concomitant unless explicitly directed.
Redundant mechanism; don't stack — switch.
Both NDRI → additive seizure-threshold lowering + sympathomimetic stack. Avoid.
NE-NE additive load, BP risk. Use cautiously.
Additive HR + BP + anxiety. Keep total daily caffeine ≤200 mg if on solriamfetol.
Quality Indicators
Pharmacy-dispensed, intact packaging
Prescription tablets in original sealed packaging from a licensed pharmacy.
Generic vs branded
Generics are usually fine but bioavailability can vary slightly; track if you switch.
Unbranded blister or counterfeit risk
Counterfeit pharmaceuticals are a known issue; verify pharmacy and lot if buying internationally.
What to Expect
- Onset~30-60 min, peak around 2 hr.
- Peakexperience: Cleaner wakefulness than amphetamines (no jitter, no euphoria, no tunnel vision); more energizing than modafinil for most users — "brighter, more…
- TaperGentler than amphetamine crash; shorter than modafinil's tail. Some users report mild fatigue rebound by 6-8 PM as plasma levels decline.
Side Effects & Safety 12
Side Effects
- 1Headache (12-16%) — usually first 1-2 weeks, typically resolves
- 2Nausea (6-9%) — dose-dependent, take with food helps
- 3Decreased appetite (6-9%) — dose-dependent; less than amphetamines but real
- 4Anxiety (5-9%) — more pronounced at 300 mg; norepinephrine-driven
- 5Insomnia (4-6%) — usually means dose taken too late in day or dose too high
- 6Increased heart rate (3-5%)
- 7Increased blood pressure (3-5%)
- 8Dry mouth, palpitations, irritability, agitation, dizziness, jitteriness
- 9Constipation, diarrhea
- 10Hyperhidrosis
- 11Bruxism
- 12Mood changes (mild dysphoria or mild euphoria depending on user)
When to Stop
- Hypertensive episodes — clinically significant BP elevations requiring discontinuation in <2% trial subjects but real. Pharmacovigilance 2025 study (PMC12453233) flagged elevated signals for palpitations + BP elevation, especially in OSA cohort.
- Major adverse cardiovascular events (MACE) — Theoretical risk from sustained BP elevation. FDA warning labels caution in patients with known CV disease, hypertension, advanced age. Long-term MACE data still maturing.
- Psychiatric: Agitation, panic attacks, mania (rare), suicidal ideation (very rare; not specifically signal-elevated vs placebo)
- First 2-4 weeks: Daily BP monitoring (cuff + Oura ring HR baseline). Discontinue if SBP rises >10 mmHg sustained or DBP >5 mmHg sustained.
- First 8 weeks: Anxiety + insomnia tracking. If anxiety is consistent at 150 mg, drop to 75 mg or discontinue.
- Renal function check at baseline and annually if continued long-term — drug is renally cleared.
References
SLEEP 2025 Abstract 0864 — Patient Preference Solriamfetol vs Modafinil/Armodafinil
71% real-world preference data, n=62 single-center retrospective.
View StudySHARP study CHEST 2024
05470-9/fulltext) — Phase 4 RCT cognitive function in OSA, RBANS effect size 0.36 independent of sleepiness reduction.
View StudySolriamfetol cognitive function SHARP — Neurology
Same trial, neurology venue.
View StudySHARP secondary analysis — Patient Care Online
Independent-of-sleepiness analysis.
View StudyNEJM Evidence — Shift Work Disorder Trial 2026
n=78 early-morning SWD; sleep latency +9.4 min vs placebo.
View StudyFOCUS Phase 3 ADHD primary endpoint
March 2025 announcement, n=516, AISRS endpoint achieved at 150 mg, not 300 mg.
View StudyIndirect treatment comparison vs modafinil/armodafinil — JCSM
Network meta-analysis suggesting solriamfetol 150/300 mg highest probability of improvement on ESS/MWT/CGI-C.
View StudyMouse anxiety comparison vs modafinil — Neurotherapeutics 2023
Solriamfetol 150 mg/kg did not produce anxiety; modafinil 100 mg/kg did.
View StudySolriamfetol abuse liability study — PMC6247449
Human abuse potential vs phentermine.
View StudyFederal Register Schedule IV placement 2019
DEA scheduling rationale.
View StudySolriamfetol pharmacokinetics + renal — Wiley/PMC6618134
Single-dose PK in renal impairment, half-life extension data.
View StudyPharmacovigilance retrospective FAERS — PMC12453233 2025
Post-marketing CV signals (palpitations, BP) elevated in OSA cohort.
View StudySolriamfetol AdisInsight review — PMID 37847434
2023 comprehensive review.
View StudyTAAR1/5-HT1A preclinical — SLEEP 2022 abstract A329
Solriamfetol additional mechanisms.
View StudyHow was your experience with this compound?
Anonymous · one vote per session · results below at 5+ votes.
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