What is diltiazem hcl er?

Diltiazem HCl ER stands for diltiazem hydrochloride extended‑release. It’s a prescription calcium channel blocker used to treat:

- High blood pressure (hypertension)
- Chronic stable angina (chest pain)
- Some heart rhythm problems (e.g., rate control in atrial fibrillation/flutter)

Key points:
- ER = extended‑release: the pill is designed to release the medicine slowly over 24 hours, often taken once daily or as directed.
- HCl = hydrochloride salt form of diltiazem.
- How it works: it relaxes and widens blood vessels and reduces heart rate and contraction, lowering blood pressure and helping with angina.
- Dosing and formulation vary by product (Capsules or tablets in different strengths). Follow your doctor’s instructions and the label. Do not crush or chew ER tablets.
- Common side effects: dizziness, headache, swelling in the ankles/feet, flushing, fatigue. May cause slow heart rate or low blood pressure.
- Important interactions/precautions: avoid grapefruit juice with many calcium channel blockers; talk to your clinician about other heart meds (like beta-blockers) and other prescription or OTC drugs. Not suitable for certain heart conditions (e.g., severe AV block, decompensated heart failure) unless directed by a doctor.
- When to seek care: chest pain, fainting, severe dizziness, very slow/fast heartbeat, or swelling of legs that worsens.

If you have a bottle and want specifics (strength, dosing, warnings) I can help interpret the label. Would you like more details on dosage ranges or potential interactions?