People mainly take Antihistamines for sleep. Based on 11 first-hand reports and 367 meta-analyses & systematic reviews in the medical literature. Ranked #1059 of 2,750 overall.
Of reports that state an outcome, 33% 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: Most intranasal medications are effective in improving rhinitis symptoms and quality of life. However, there are relevant differences in the associated evidence certainty.
PubMed 38685482 ↗Conclusion: After diagnosis and treatment of anaphylaxis, all patients should be kept under observation until symptoms have fully resolved. All patients with anaphylaxis should receive education on anaphylaxis and risk of recurrence, trigger avoidance, self-injectable epinephrine education, referral to an allergist, and be educated about thresholds for further care.
PubMed 32001253 ↗Conclusion: The majority of cases in bacterial conjunctivitis are self-limiting and no treatment is necessary in uncomplicated cases. However, conjunctivitis caused by gonorrhea or chlamydia and conjunctivitis in contact lens wearers should be treated with antibiotics. Treatment for viral conjunctivitis is supportive. Treatment with antihistamines and mast cell stabilizers alleviates the symptoms of allergic conjunctivitis.
PubMed 24150468 ↗Conclusion: Moderately strong evidence suggests that single-dose antihistamines provide greater vertigo relief at 2 hours than single-dose benzodiazepines. Furthermore, the available evidence did not support an association of benzodiazepine use with improvement in any outcomes for acute vertigo. Other evidence suggested that daily antihistamine use may not benefit patients with acute vertigo. Larger randomized trials comparing both antihistamines and benzodiazepines with placebo could better clarify the relative efficacy of these medications.
PubMed 35849408 ↗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.
“Also antihistamines seem to help me and anti inflammatories as well.they reduce my symptoms by like 40%.”
“I tried lots of different medications and they don’t really help and they also made me lose muscle.”
“What I've tried: antihistamines, low histamine diet, strict keto diet. Nothing really helped.”
“Antihistamines are an effective vasoconstrictor, and they were my most effective tool. ... within two years of nearly constant use, I was a space case.”
“Antihistamines were more effective for the sole purpose of inducing sleep”
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 3, 2026. How we rate