LOW-VOLUME · HOSP-HEAVY
chlorpheniramine Side Effects
chlorpheniramine (also sold as Chlor-Trimeton) is a LOW-VOLUME FAERS extract #375 of 524 by FAERS report count. Still opens on HOSP-HEAVY: 44.5% mention hospitalization (2,771 reports).
Data updated 2026-05-15
- 6,221
- FAERS reports
Thinner FAERS book - still a temporal association ledger, not proof of cause. Methodology.
chlorpheniramine: 44.5% mention hospitalization (2,771 reports). Death stamp DEATH-HEAVY; volume band LOW-VOLUME #375 of 524 by FAERS report count.
Thinner FAERS extract for chlorpheniramine (Chlor-Trimeton) (6,221 reports #375 of 524 by FAERS report count). 44.5% mention hospitalization (2,771 reports). Sparse books still carry named reaction rows when present; not medical advice.
Counts from the openFDA FAERS extract (2004–2025). Stamps WATCHLIST · DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED.
NAUSEA leads 601 of 6,221 reports
Who reports · age peak 45-64 (SEX-BALANCED)
Sex coding · SEX-BALANCED
Age peak 45-64 (1,801 reports)
FAERS filings rising toward 2025
Reactions in Death Reports
Death-mentioned subset is HEAVY here (1,084 reports, 17.4%). Top co-reported reactions in that subset - voluntary, not causal.
| Reaction | Reports |
|---|---|
| DEATH | 240 |
| NAUSEA | 151 |
| DISEASE PROGRESSION | 136 |
| DIARRHOEA | 131 |
| FATIGUE | 125 |
| PNEUMONIA | 105 |
| NEUTROPENIA | 104 |
| NEUROPATHY PERIPHERAL | 96 |
| SEIZURE | 94 |
| PYREXIA | 85 |
| DYSPNOEA | 80 |
| PLATELET COUNT DECREASED | 80 |
| MUCOSAL INFLAMMATION | 79 |
| OVERDOSE | 75 |
| VOMITING | 74 |
| DYSPEPSIA | 73 |
| ALOPECIA | 71 |
| COVID-19 | 68 |
| TOXICITY TO VARIOUS AGENTS | 68 |
Reactions in Hospitalization Reports
Hospitalization is HEAVY (2,771, 44.5% of the book). Top reactions in those rows:
| Reaction | Reports |
|---|---|
| DIARRHOEA | 372 |
| NAUSEA | 331 |
| PYREXIA | 263 |
| VOMITING | 260 |
| FATIGUE | 253 |
| PNEUMONIA | 208 |
| DYSPNOEA | 199 |
| DISEASE PROGRESSION | 195 |
| FEBRILE NEUTROPENIA | 193 |
| NEUROPATHY PERIPHERAL | 157 |
| NEUTROPENIA | 154 |
| PLATELET COUNT DECREASED | 145 |
| COUGH | 134 |
| ABDOMINAL PAIN | 132 |
| MUCOSAL INFLAMMATION | 130 |
| ALOPECIA | 126 |
| ANAEMIA | 124 |
| CONSTIPATION | 123 |
| SEIZURE | 122 |
How to read chlorpheniramine FAERS figures (WATCHLIST · DEATH-HEAVY · HOSP-HEAVY)
FAERS holds 6,221 voluntary reports linked to chlorpheniramine (Chlor-Trimeton), 2004-2025. Death is listed on 1,084 (17.4%). Hospitalization appears on 2,771 (44.5%). Top co-reported indication: Product Used For Unknown Indication.
Sparse extract - named reactions and SEX-BALANCED skew still differ by drug; not a complete safety profile.
Read with chlorpheniramine
Peers ranked by ABS(total_reports), then an ABS(death_share) pole; guide hop follows DEATH-HEAVY · HOSP-HEAVY stamps.
ABS(total_reports) peer at 6,176 FAERS cases (Δ 45 lighter vs chlorpheniramine); DEATH-HEAVY · HOSP-HEAVY · FEMALE-LED vs this page's WATCHLIST · DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED.
ABS(total_reports) peer at 6,319 FAERS cases (Δ 98 heavier vs chlorpheniramine); DEATH-HEAVY · HOSP-MID · FEMALE-LED vs this page's WATCHLIST · DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED.
ABS(total_reports) peer at 6,323 FAERS cases (Δ 102 heavier vs chlorpheniramine); DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED vs this page's WATCHLIST · DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED.
ABS(total_reports) peer at 6,109 FAERS cases (Δ 112 lighter vs chlorpheniramine); DEATH-HEAVY · HOSP-MID · FEMALE-LED vs this page's WATCHLIST · DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED.
ABS(death_share) pole at 62.1% death-mentioned reports (Δ 44.7 pp vs chlorpheniramine's DEATH-HEAVY): CASELOAD · HOSP-MID.
chlorpheniramine stamps DEATH-HEAVY · HOSP-HEAVY; FAERS outcome shares are signal-detection rates, not incidence. Read them next to caseload WATCHLIST and the label guide.