Hydralazine
General
- Type: Vasodilator
- Dosage Forms: 10, 25, 50, 100; PO, IM, IV
- Common Trade Names: Apresoline
Adult Dosing
- hypertension: 10 - 50mg PO QID
- Hypertensive crisis: 10-20mg IM/IV q2-4h
Pediatric Dosing
- Hypertensive Crisis:
- 1 mo - 12 years: 0.1 - 0.5mg/kg IM/IV q4-6h, max dose of 20mg
- > 12 years old: 10 - 20mg IV q2-4h
Special Populations
- Pregnancy Rating: C
- Lactation: Probably Safe
- Renal Dosing
- Adult: CrCl 10-50: give q8h, CrCl <10, give q8-16h
- Pediatric: CrCl 10-50: give q8h, CrCl <10, give q8-16h
- Hepatic Dosing
- Adult: not defined
- Pediatric: not defined
Contraindications
- Allergy to class/drug
- mitral valvular rheumatic heart disease
- Caution if renal impairment
Adverse Reactions
Serious
- MI
- neutropenia
- lupus erythematosus (SLE)
- peripheral neuritis
Common
- headache
- tachycardia
- angina
- nausea/vomiting
- rash
Pharmacology
- Half-life: 3-7 hours
- Metabolism: liver
- Excretion: urine, feces
- Mechanism of Action: directly dilates peripheral vessels
Indications by Condition
The following table is automatically generated from disease/condition pages across WikEM.
| Indication | Dose | Context | Route | Population |
|---|---|---|---|---|
| Hypertensive emergency | 5-20 mg IV q4-6 hr | Antihypertensive | IV | Adult |
| Stroke (main) | 10-20 mg IV, repeat q4-6h | BP control in acute stroke | IV | Adult |