HIGH-VOLUME · HOSP-HEAVY
omeprazole Side Effects
omeprazole (also sold as Prilosec) is HIGH-VOLUME in this FAERS book #12 of 524 by FAERS report count. Signature opener: HOSP-HEAVY - 36.9% mention hospitalization (122,601 reports).
Data updated 2026-05-15
- 331,875
- FAERS reports
FAERS voluntary reports, 1999 to 2025. High volume tracks exposure and reporting culture; see methodology for de-dup rules.
omeprazole: 36.9% mention hospitalization (122,601 reports). Death stamp DEATH-HEAVY; volume band HIGH-VOLUME #12 of 524 by FAERS report count.
High-report extract for omeprazole (Prilosec): 331,875 FAERS rows (1999-2025). Top named reactions: FATIGUE, NAUSEA, DIARRHOEA. Outcome stamps DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED. FAERS is voluntary signal detection, not incidence.
Counts from the openFDA FAERS extract (1999–2025). Stamps MEGA-CASE · DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED.
FATIGUE leads 19,901 of 331,875 reports
Who reports · age peak 45-64 (SEX-BALANCED)
Sex coding · SEX-BALANCED
Age peak 45-64 (80,287 reports)
FAERS filings rising toward 2025
Reactions in Death Reports
Death-mentioned subset is HEAVY here (30,378 reports, 9.2%). Top co-reported reactions in that subset - voluntary, not causal.
| Reaction | Reports |
|---|---|
| DEATH | 9,408 |
| PNEUMONIA | 2,128 |
| ACUTE KIDNEY INJURY | 1,741 |
| DYSPNOEA | 1,556 |
| CHRONIC KIDNEY DISEASE | 1,506 |
| SEPSIS | 1,459 |
| RENAL FAILURE | 1,398 |
| DIARRHOEA | 1,223 |
| RESPIRATORY FAILURE | 1,215 |
| VOMITING | 1,162 |
| NAUSEA | 1,105 |
| CARDIAC ARREST | 1,086 |
| ASTHENIA | 1,075 |
| COMPLETED SUICIDE | 1,037 |
| PYREXIA | 1,027 |
| FATIGUE | 998 |
| ANAEMIA | 907 |
| TOXICITY TO VARIOUS AGENTS | 897 |
| CARDIO-RESPIRATORY ARREST | 834 |
Reactions in Hospitalization Reports
Hospitalization is HEAVY (122,601, 36.9% of the book). Top reactions in those rows:
| Reaction | Reports |
|---|---|
| DYSPNOEA | 8,160 |
| DIARRHOEA | 7,946 |
| PNEUMONIA | 7,846 |
| NAUSEA | 7,140 |
| VOMITING | 7,018 |
| FALL | 6,639 |
| FATIGUE | 6,112 |
| PYREXIA | 5,887 |
| ASTHENIA | 5,276 |
| PAIN | 5,192 |
| ACUTE KIDNEY INJURY | 5,092 |
| MALAISE | 4,753 |
| DIZZINESS | 4,627 |
| DRUG INTERACTION | 4,439 |
| ANAEMIA | 4,293 |
| HYPOTENSION | 4,245 |
| ABDOMINAL PAIN | 4,227 |
| HEADACHE | 4,186 |
| URINARY TRACT INFECTION | 3,748 |
How to read omeprazole FAERS figures (MEGA-CASE · DEATH-HEAVY · HOSP-HEAVY)
FAERS holds 331,875 voluntary reports linked to omeprazole (Prilosec), 1999-2025. Death is listed on 30,378 (9.2%). Hospitalization appears on 122,601 (36.9%). Top co-reported indication: Product Used For Unknown Indication.
MEGA-CASE books overweight common drugs and loud reporting cultures; HOSP-HEAVY is the page opener, not a per-patient risk.
Read with omeprazole
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 342,023 FAERS cases (Δ 10,148 heavier vs omeprazole); DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED vs this page's MEGA-CASE · DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED.
ABS(total_reports) peer at 351,750 FAERS cases (Δ 19,875 heavier vs omeprazole); DEATH-HEAVY · HOSP-MID · SEX-BALANCED vs this page's MEGA-CASE · DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED.
ABS(total_reports) peer at 304,465 FAERS cases (Δ 27,410 lighter vs omeprazole); DEATH-HEAVY · HOSP-MID · FEMALE-LED vs this page's MEGA-CASE · DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED.
ABS(total_reports) peer at 297,692 FAERS cases (Δ 34,183 lighter vs omeprazole); DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED vs this page's MEGA-CASE · DEATH-HEAVY · HOSP-HEAVY · SEX-BALANCED.
ABS(death_share) pole at 62.1% death-mentioned reports (Δ 53.0 pp vs omeprazole's DEATH-HEAVY): CASELOAD · HOSP-MID.
omeprazole stamps DEATH-HEAVY · HOSP-HEAVY; FAERS outcome shares are signal-detection rates, not incidence. Read them next to caseload MEGA-CASE and the label guide.