People mainly take Ephedrine for energy, focus, performance. Based on 44 first-hand reports and 80 meta-analyses & systematic reviews in the medical literature. Ranked #40 of 1,974 overall.
Of reports that state an outcome, 60% are positive.
Of the people who reported each effect, the share who said it got better.
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: CMSs are an increasingly recognised group of genetically transmitted defects, which usually respond favorably to drugs enhancing the neuromuscular transmission. CMSs need to be differentiated from neuromuscular disorders due to muscle or nerve dysfunction.
PubMed 30808424 ↗Conclusion: Several potential new therapies targeting weight loss and obesity through the CNS pathways or peripheral adiposity signals are in early phase clinical trials. Over the next decade the drug treatment of obesity is likely to change significantly because of the availability of new pharmacotherapies to regulate eating behaviours, nutrient partitioning and/or energy expenditure.
PubMed 15977970 ↗Conclusion: Ephedrine and guaifenesin have been shown to cause nephrolithiasis in cases of abuse when taken individually or in combination. It is important for the clinician to be aware of the potential for these compounds to cause nephrolithiasis.
PubMed 15673990 ↗Conclusion: There was no evidence that hypertension, bradycardia or neonatal endpoints were affected. Phenylephrine reduced the risk for hypotension and nausea and vomiting after spinal doses of bupivacaine generally exceeding 8 mg, but there was no evidence that it reduced other maternal or neonatal morbidities.
PubMed 24588024 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
Verbatim quotes, shortened only — each links to the original discussion.
“I have used quite a few nootropics and stims over the years (modafinil, caffeine, ephedrine, racetams, noopept). While they all seem to work well...”
“Ephedrine”
“Ephedrine + caffeine”
“It does make me not hungry for a few hours, but after the effect wears off all I want to do is eat”
“Intense focus, limitless energy...little to no side effects over a long period of time”
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate