Herbesser Sr (Diltiazem Hydrochloride)

Herbesser Sr is prescribed for several cardiovascular conditions where reduction of blood pressure or myocardial oxygen demand is required.

• Management of hypertension in adults
• Treatment of angina pectoris, including chronic stable angina
• Rate control in patients with atrial fibrillation
• Prevention of angina attacks during physical exertion
• Adjunct therapy with other antihypertensive agents when monotherapy is insufficient

The safety profile of diltiazem hydrochloride includes both frequently observed and less common adverse reactions.

Common

• Headache
• Flushing or warmth sensation
• Peripheral edema, especially of the ankles
• Dizziness or light‑headedness
• Nausea or mild gastrointestinal upset
• Fatigue or feeling of weakness

Serious

• Bradycardia or markedly slowed heart rate
• Significant hypotension
• Heart block or advanced atrioventricular conduction disturbances
• Severe elevation of liver enzymes
• Allergic reactions such as rash, angioedema, or anaphylaxis

Before initiating Herbesser Sr, clinicians should evaluate patient-specific factors and monitor for potential risks.

• Assess baseline blood pressure and heart rate
• Avoid use in patients with severe sinus node dysfunction or high‑grade AV block
• Use caution in patients with heart failure, particularly reduced ejection fraction
• Monitor liver function tests during therapy
• Adjust dose in hepatic impairment
• Review concomitant medications that affect cardiac conduction
• Consider potential risks in pregnancy or lactation, although the category is not established

Diltiazem interacts with several drug classes; awareness of these interactions helps prevent adverse events.

Avoid

• Concurrent use with strong CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin) may increase diltiazem levels
• Co‑administration with other non‑dihydropyridine calcium channel blockers can cause excessive cardiac depression
• Combination with beta‑blockers may lead to profound bradycardia or atrioventricular block

Use with caution

• Co‑administration with digoxin may raise digoxin concentrations
• Concurrent use with statins metabolized by CYP3A4 (e.g., simvastatin, lovastatin) may increase statin exposure
• Use with other antihypertensive agents may require dose adjustments to avoid hypotension