Heart & Blood Pressure Changes
Anthracyclines (doxorubicin, epirubicin), HER2-targeted therapies (trastuzumab), and radiation to the chest cause cardiomyopathy and heart failure. VEGF inhibitors (bevacizumab, sunitinib) cause hypertension. Certain drugs cause arrhythmias. Cardio-oncology is now a recognised specialty. Most natural approaches are supportive and preventive — not replacements for cardiac monitoring.
Herbs & Supplements — Safety Information
Herbal information is for educational purposes. Many herbs interact with chemotherapy and other medications — consult your oncologist before use.
When to Seek Medical Help Immediately
- •New chest pain or pressure
- •Palpitations, irregular heartbeat, or fainting
- •Sudden severe hypertension (>180/120) — hypertensive emergency
- •Significant breathlessness when lying flat (may be heart failure)
- •Lower limb swelling with breathlessness
3 Natural Remedies
Coenzyme Q10 (CoQ10)
Best for: Cardioprotection during doxorubicin, epirubicin, or other anthracycline chemotherapy
CoQ10 is an endogenous mitochondrial antioxidant. Anthracyclines generate free radicals in heart muscle cells, and CoQ10 may reduce this oxidative damage. Multiple small RCTs show CoQ10 supplementation during doxorubicin therapy significantly reduces markers of cardiac damage and preserves ejection fraction. It is recommended in cardio-oncology integrative guidelines.
🧪 How to Prepare
Ubiquinol form (not ubiquinone) for better absorption: 200–400 mg daily. Take with a fat-containing meal (highly fat-soluble). Continue throughout anthracycline-containing regimen and for 6–12 months after.
⏰ When to Take
Start before first anthracycline dose if possible. Take daily with food.
Supervised Aerobic Exercise
Best for: Cardioprotection during anthracyclines, trastuzumab, prevention of hypertension on VEGF inhibitors
Regular moderate aerobic exercise is the most evidence-supported intervention for both preventing and treating cancer treatment-induced cardiac toxicity. Exercise increases cardiac reserve, reduces hypertension, improves cardiac output, and reduces inflammation. Multiple trials show it preserves ejection fraction during anthracycline therapy.
🧪 How to Prepare
Under oncologist clearance and ideally supervised by a cancer rehabilitation physiotherapist: aim for 150 minutes of moderate aerobic exercise per week (brisk walking, cycling, swimming). Start low, progress slowly. Heart rate monitoring (not exceeding 70–80% max HR initially) is advisable during treatment.
⏰ When to Take
Throughout treatment and long-term (the cardiac benefit is cumulative and ongoing).
DASH Diet Principles
Best for: Hypertension from VEGF inhibitors, steroid-induced blood pressure elevation
The DASH (Dietary Approaches to Stop Hypertension) diet significantly lowers blood pressure through high potassium, magnesium, and fibre with low sodium. It is directly applicable to cancer patients experiencing treatment-induced hypertension from VEGF inhibitors or steroids.
🧪 How to Prepare
Focus on: abundant vegetables and fruit (potassium-rich: banana, avocado, sweet potato, leafy greens), whole grains, low-fat dairy or dairy alternatives, lean protein, nuts and seeds. Reduce: red meat, full-fat dairy, sweets, and especially sodium (<2000 mg/day). Avoid added salt.
⏰ When to Take
Throughout any period of elevated blood pressure. Blood pressure response to diet changes takes 2–4 weeks.
Evidence Level Guide