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Hydralazine Side Effects

The most commonly reported side effects of hydralazine include chronic kidney disease, acute kidney injury, and renal failure, based on 38,337 FDA adverse event reports from 2004 to 2025. 4.0% of reports found the drug to be ineffective.

Hydralazine side effects

Percentages show how often each reaction appears relative to total reports for hydralazine.

1
Chronic Kidney Disease7.9%3,039
2
Acute Kidney Injury7.5%2,891
3
Renal Failure6.0%2,315
4
Fatigue5.2%1,978
5
Dyspnoea5.0%1,918
6
Diarrhoea4.7%1,801
7
End Stage Renal Disease4.5%1,707
8
Death4.3%1,655
9
Nausea4.2%1,596
10
Drug Ineffective4.0%1,531
11
Hypertension4.0%1,520
12
Off Label Use3.8%1,438
13
Asthenia3.1%1,191
14
Headache3.1%1,189
15
Anti-neutrophil Cytoplasmic Antibody Positive Vasculitis3.1%1,179

These are voluntary reports and do not establish that hydralazine caused these reactions.

Report severity

76.6%Serious29,369 reports
43.3%Hospitalizations16,585 reports
12.7%Fatal4,887 reports

Seriousness is determined by the reporter, not by OpenClaim.

Hydralazine drug interactions

Other drugs that appear in adverse event reports alongside hydralazine. Drugs flagged as a suspected cause appear in the first column. Drugs taken at the same time but not suspected appear in the second.

Also suspected

1
Omeprazole6.8%2,604
2
Esomeprazole6.4%2,443
3
Pantoprazole-sodium6.0%2,316
4
Lenalidomide5.5%2,103
5
Lansoprazole4.4%1,698
6
Amlodipine3.4%1,315
7
Patiromer-sorbitex-calcium2.7%1,051
8
Metoprolol2.7%1,047
9
Furosemide2.3%895
10
Aspirin2.1%806
11
Dexlansoprazole2.0%767
12
Apixaban1.9%711
13
Valsartan1.8%678
14
Carvedilol1.7%657
15
Lisinopril1.6%607

Taken alongside

1
Furosemide28.9%11,093
2
Amlodipine28.6%10,958
3
Aspirin27.4%10,513
4
Metoprolol22.6%8,649
5
Acetaminophen20.2%7,763
6
Atorvastatin-calcium20.2%7,761
7
Carvedilol18.6%7,149
8
Insulin16.8%6,451
9
Ergocalciferol16.0%6,148
10
Lisinopril14.6%5,605
11
Levothyroxine-sodium14.0%5,385
12
Losartan-potassium12.9%4,951
13
Gabapentin12.7%4,880
14
Clonidine12.5%4,811
15
Isosorbide12.5%4,811

Co-occurrence in adverse event reports does not establish a drug interaction. Patients often take multiple medications, and these lists reflect prescribing patterns rather than causal relationships. Consult a healthcare provider about potential drug interactions.

Who reports hydralazine side effects

49.6% of hydralazine adverse event reports involve female patients and 41.6% involve male patients. The largest age group is elderly at 57%. These figures reflect who reports side effects, not underlying risk.

Sex

Female49.6%
Male41.6%
Unknown8.8%

Age group

< 21.1%
2–110.6%
12–170.4%
18–6441.3%
65+56.5%

What is hydralazine used for

Conditions and purposes for which patients were taking hydralazine when the adverse event was reported.

Abdominal PainAccidental ExposureAcute Kidney InjuryAgitationAnaesthesia ProcedureAneurysm RepairAngina PectorisAngiopathyAnkylosing SpondylitisAntiallergic TherapyAntibiotic ProphylaxisAnticoagulant TherapyAnxietyAnxiolytic TherapyAortic Dissection

Showing 15 of 400 indications

Hydralazine brand names and reporting trend

Hydralazine is sold under the brand name Apresoline.

Brand names

Apresoline30

Quarterly reports (20042025)

20052010201520202025

An upward trend reflects increased FAERS reporting overall, not necessarily increased risk.

Taking hydralazine with another medication?

Ask OpenClaim about your specific drug combination. Get a sourced report using FDA data, drug labels, and medical literature.