Direct Acting Vasodilators - hydralazine

Moderate to Severe Hypertension: Hydralazine is primarily used to manage moderate to severe high blood pressure.
Hypertensive Crisis: The intravenous form can be utilized in urgent hypertensive situations.
Heart Failure Treatment: Often prescribed short-term alongside digitalis and other vasodilators for heart failure management.

Common Symptoms: Patients may experience headaches, dizziness, weakness, and fatigue.
Reflex Tachycardia: Rapid heart rate can occur as a compensatory response.
Systemic Lupus Erythematosus (SLE)-like Syndrome: High doses may lead to symptoms such as facial rash, joint pain, fever, nephritis, and pericarditis, mimicking lupus.
Fluid Retention and Edema: This can complicate patient conditions.
Withdrawal Effects: Abrupt discontinuation may precipitate a hypertensive crisis or lead to heart failure.

Patient Education: Inform clients about possible side effects like headaches and tachycardia.
Monitor Vitals: Check pulse regularly and report tachycardia.
- Beta-Blocker Addition: If tachycardia occurs, a beta-blocker may be added to the regimen, but watch for hypotension.
Monitor for SLE Symptoms: Report any signs such as facial rash, joint pain, or fatigue to the healthcare provider; hydralazine may need to be discontinued.
Fluid Retention Monitoring: Observe for edema and lung crackles, indicating fluid overload.
- Consider combining hydralazine with a diuretic to manage fluid retention.
Tapering: When discontinuing hydralazine, do so gradually to avoid withdrawal complications.

Forms Available: Hydralazine can be administered orally, intramuscularly (IM), or intravenously (IV).
Oral Dosing: Take oral doses with food to enhance absorption and start at low doses, gradually increasing as needed.
IV Administration: Administer IV form undiluted and never mix with other solutions.

Adverse Reactions Reporting: Advise patients to inform their provider about any unresolved adverse reactions.
Activity Recommendations: Encourage participation in quiet and safe activities post-first dose to reduce risks associated with side effects.
- Start with a low dose to mitigate first-dose effects.
Sign Monitoring: Report any rapid heartbeat, facial rash, joint pain, unexplained fever, chest pain, fatigue, or edema to the provider.
Medication Compliance: Emphasize the importance of not abruptly stopping medication without consulting a healthcare provider.

Known Sensitivity: Avoid use in patients with a known allergy or sensitivity to hydralazine.

Cerebrovascular and Cardiovascular Disease: Use caution in patients with predispositions to these conditions.
Severe Renal or Hepatic Impairment: Monitor closely; dosage adjustments may be necessary due to impaired organ function.

MAO Inhibitors: Concurrent use can lead to severe hypotension; caution is advised.
Antihypertensive Medications: Other antihypertensives can exacerbate hypotensive effects.
NSAIDs: These may reduce the effectiveness of hydralazine.