Drug Class: Dihydropyridine Calcium Channel Blocker | Form: Oral Tablet | Prescription Status: Prescription Only (Rx) — DRAP Registered
What is Sofvasc 10mg Tablet? Sofvasc 10mg contains Amlodipine Besylate — a third-generation dihydropyridine calcium channel blocker with the longest half-life among its class at approximately 35 to 50 hours, providing exceptionally smooth and sustained blood pressure control from a single daily dose. The 10mg strength is the maximum approved Amlodipine dose — prescribed for patients whose hypertension or angina remains inadequately controlled on the standard 5mg dose. Amlodipine's gradual onset of action produces no reflex tachycardia — a significant advantage over shorter-acting calcium channel blockers — and its long half-life means missing an occasional dose has minimal impact on blood pressure control compared to shorter-acting antihypertensives. It is one of the most extensively studied and widely prescribed antihypertensives globally with a proven cardiovascular protective benefit in high-risk patients.
What is Sofvasc 10mg Used For?
- Hypertension — maximum dose for blood pressure inadequately controlled on 5mg (ہائی بلڈ پریشر جو کم خوراک سے کنٹرول نہ ہو)
- Chronic stable angina — prevention of exertional chest pain from coronary artery disease (سینے کے درد کی روک تھام)
- Vasospastic angina — Prinzmetal angina caused by coronary artery spasm (خون کی نالیوں کی اینٹھن سے سینے کا درد)
- Cardiovascular risk reduction — reducing heart attack and stroke risk in high-risk hypertensive patients (دل کے دورے اور فالج کی روک تھام)
- Hypertension with diabetes — Amlodipine safe and effective in diabetic patients unlike beta-blockers
- Hypertension with asthma or COPD — preferred over beta-blockers in respiratory disease patients
How Does it Work? Amlodipine selectively blocks L-type voltage-gated calcium channels in vascular smooth muscle — preventing calcium entry that triggers smooth muscle contraction. This causes sustained relaxation and dilation of peripheral arteries and coronary arteries — reducing systemic vascular resistance and blood pressure while simultaneously improving coronary blood flow to the heart muscle. At the 10mg dose this calcium channel blockade is more complete and sustained than at 5mg — providing stronger peripheral vasodilation and more comprehensive blood pressure reduction. Amlodipine's gradual binding to calcium channels produces slow onset without reflex sympathetic activation — avoiding the compensatory tachycardia seen with some other vasodilators. Its antianginal effect results from both coronary vasodilation improving myocardial oxygen delivery and peripheral vasodilation reducing cardiac afterload and workload.
Dosage and Administration
⚠️ Never stop suddenly — gradual dose reduction under cardiologist supervision required for long-term users. Takes 7 to 14 days for full blood pressure lowering effect at 10mg. Can be taken with or without food at the same time each day. Monitor blood pressure and heart rate regularly. Do not exceed 10mg daily — this is the maximum approved dose.
| Indication | Usual Adult Dose | Frequency | Notes |
|---|---|---|---|
| Hypertension — maximum dose | 10mg | Once daily | When 5mg provides insufficient control |
| Chronic stable angina | 5 – 10mg | Once daily | Adjusted to symptom control |
| Vasospastic angina | 5 – 10mg | Once daily | As prescribed by cardiologist |
| Elderly patients | 5mg | Once daily | Use 10mg with caution in elderly — increased hypotension risk |
| Hepatic impairment | 2.5 – 5mg | Once daily | Start low — 10mg only under specialist supervision |
Active Ingredients
| Ingredient | Strength |
|---|---|
| Amlodipine Besylate | 10mg (as Amlodipine) |
Who Should NOT Take Sofvasc 10mg?
- Allergy to Amlodipine, any dihydropyridine calcium channel blocker, or Amlodipine Besylate
- Severe hypotension — systolic blood pressure below 90mmHg
- Cardiogenic shock
- Unstable angina — acute coronary syndrome excluding vasospastic angina
- Significant aortic stenosis — severe narrowing of aortic heart valve
- Acute myocardial infarction — within first month; use with caution
- Severe liver impairment — Amlodipine extensively hepatically metabolised; 10mg contraindicated
- Pregnancy — particularly first trimester; consult cardiologist before use
- Breastfeeding — Amlodipine passes into breast milk
- Children under 6 years for hypertension indication
Side Effects
Common: Ankle swelling — peripheral oedema from peripheral vasodilation (ٹخنوں کی سوجن — عام اور عموماً بے ضرر — 10mg پر زیادہ عام ہے), facial flushing and warmth (گرمی کا احساس), mild headache, mild dizziness especially on standing, mild fatigue, mild palpitations — ankle swelling is significantly more common at 10mg than 5mg and is the most frequent reason for dose reduction.
Serious — Stop and seek emergency help immediately: Severe hypotension with fainting — particularly in volume-depleted patients or those on multiple antihypertensives (بے ہوشی — فوری مدد لیں), significant worsening of angina or heart attack paradoxically shortly after starting — rare vasodilatory reflex (سینے میں شدید درد — فوری ہسپتال جائیں), severe allergic reaction — sudden widespread rash, swelling of face or throat, difficulty breathing (فوری ہسپتال جائیں), significant liver toxicity — yellowing of skin or eyes with abdominal pain (یرقان — فوری مدد لیں), erythromelalgia — severe burning pain and redness of extremities — rare but distressing side effect, severe skin reactions including blistering or peeling.
Drug Interactions
| Medicine | Interaction |
|---|---|
| Simvastatin | Amlodipine increases Simvastatin blood levels significantly — limit Simvastatin to maximum 20mg daily when combined with Amlodipine 10mg; increased myopathy risk at higher statin doses |
| Cyclosporine / Tacrolimus | Amlodipine significantly increases their blood levels — increased nephrotoxicity and toxicity risk; monitor closely |
| Ketoconazole / Itraconazole | Increase Amlodipine blood levels — increased side effect risk including excessive hypotension |
| Rifampicin | Dramatically reduces Amlodipine blood levels — significantly reduced antihypertensive effectiveness |
| Other antihypertensives | Additive blood pressure lowering — increased hypotension risk at maximum 10mg dose |
| Sildenafil (Viagra) | Additive vasodilation — significant hypotension risk; take Sildenafil at least 4 hours apart |
| Tacrolimus | Amlodipine increases Tacrolimus blood levels — monitor levels and kidney function |
| Lithium | Amlodipine may rarely increase Lithium neurotoxicity — monitor |
| Grapefruit juice | Inhibits Amlodipine metabolism — increases blood levels and hypotension risk; avoid completely |
| Alcohol (شراب) | Increases vasodilation and hypotension risk — avoid excessive consumption |
Storage: Store below 25°C in a cool, dry place. Protect from moisture and direct sunlight. Keep out of reach of children (بچوں کی پہنچ سے دور رکھیں). Do not use after expiry date.
FAQs
Q: Why does Sofvasc 10mg cause more ankle swelling than the 5mg dose? Ankle swelling is a dose-dependent effect of Amlodipine's peripheral vasodilation — dilation of small arteries increases capillary pressure in the legs, causing fluid to shift into surrounding tissue. At 10mg this vasodilatory effect is more pronounced than at 5mg — producing more frequent and noticeable ankle oedema. While generally harmless, significant ankle swelling may require dose reduction to 5mg or switching to a combination tablet that includes an ACE inhibitor or ARB which counteracts this fluid shift.
Q: Is Sofvasc 10mg the maximum dose that can be prescribed — can doctors ever prescribe more? 10mg is the absolute maximum approved daily dose of Amlodipine — exceeding this provides no additional blood pressure lowering benefit while significantly increasing side effect risk, particularly ankle oedema and hypotension. If blood pressure remains inadequately controlled on 10mg Amlodipine the correct approach is to add a second antihypertensive from a different class rather than exceeding the maximum dose.
Q: Can Sofvasc 10mg be safely taken by patients with asthma or COPD who cannot take beta-blockers? Yes — Amlodipine is one of the preferred antihypertensives for patients with asthma or COPD specifically because it does not affect bronchial beta-2 receptors — causing no bronchospasm or worsening of breathing. It is the recommended alternative to beta-blockers for both hypertension and angina management in patients with significant respiratory disease.
Medical Disclaimer: This information is for general awareness only and does not replace medical advice. Always consult a qualified doctor or pharmacist before taking any prescription medicine.