How does diltiazem work?
Diltiazem blocks calcium from entering muscle cells in the heart and blood vessels, causing them to relax. This helps lower blood pressure, reduce heart workload, and improve blood flow to the heart.
What is diltiazem used to treat?
Diltiazem is commonly prescribed for:
- High blood pressure (hypertension)
- Angina (chest pain caused by reduced blood flow to the heart)
- Certain irregular heart rhythms (such as atrial fibrillation)
Who can take diltiazem?
Diltiazem is suitable for most adults who need to manage high blood pressure, angina, or heart rhythm conditions.
Who might not be able to take diltiazem?
Diltiazem may not be suitable if you:
- Have severe heart failure
- Have low blood pressure (hypotension)
- Have a slow heart rate (bradycardia) or heart block
- Are taking certain medications that affect heart rhythm
Can I take diltiazem if I’m pregnant or breastfeeding?
Diltiazem isn’t usually recommended during pregnancy or breastfeeding. Speak to your doctor about safer alternatives.
What if I miss a dose?
If you forget a dose, take it as soon as you remember. If it’s close to your next dose, skip the missed one—do not take two doses at once.
How effective is diltiazem?
Diltiazem is highly effective at lowering blood pressure, managing angina, and controlling heart rhythm issues when taken as prescribed.
What should I do if I take too much?
Taking too much diltiazem can cause dangerously low blood pressure, slow heart rate, or fainting. If you think you’ve taken too much, seek emergency medical help immediately.
What dose of diltiazem is usually taken?
- For high blood pressure: 120mg to 360mg once daily (extended-release) or divided into smaller doses (immediate-release)
- For angina: 60mg to 120mg three to four times daily
- For heart rhythm conditions: Dose varies and is determined by your doctor
Your doctor will determine the correct dose based on your condition.
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What are the side effects of diltiazem?
Common side effects include:
- Dizziness or lightheadedness
- Fatigue
- Swelling in the ankles or feet
- Flushing or warmth in the face
- Headache
Serious side effects, such as severe dizziness, chest pain, or irregular heartbeat, require urgent medical attention.
How should I take diltiazem?
Diltiazem is taken as tablets or capsules, usually once or twice daily depending on the formulation.
When should diltiazem be taken?
Diltiazem should be taken at the same time each day, with or without food.
What are the brand names for diltiazem?
Diltiazem is available as a generic medicine, but some branded versions include:
- Tildiem
- Adizem
- Cardizem
Final thoughts
Diltiazem is an effective medication for high blood pressure, angina, and heart rhythm disorders, but it should be taken exactly as prescribed. Regular monitoring may be needed, and if side effects occur, speak to your doctor or pharmacist.
