Grapefruit juice does enhance the effects of certain drugs by inhibiting CYP3A4 enzymes (a key enzyme for metabolizing drugs) in the intestine and liver, which may lead to increased blood drug concentrations and cause side effects and even toxic reactions. The following are some common drug categories and specific names affected： --- ### **1. Cholesterol-lowering drugs (statins)** -**Simvastatin (Simvastatin)**: Taking with grapefruit juice may increase the risk of muscle injury (rhabdomyolysis). -**Atorvastatin (Atorvastatin)**: A small amount of grapefruit juice may affect metabolism, and you need to follow your doctor's instructions. -**Lovastatin (Lovastatin)**: Significant interaction with grapefruit juice. **Note**: Pravastatin and Rosuvastatin are less affected by grapefruit juice. --- ### **2. Antihypertensive drugs (calcium channel blockers)** -**Felodipine (Felodipine)** -**Nifedipine (Nifedipine)** -**Nisoldipine (Nisoldipine)** -**Amlodipine (Amlodipine)** (a small amount of effect, but still need to be cautious) Grapefruit juice may enhance the antihypertensive effect, causing hypotension, dizziness, or heart palpitations. --- ### **3. immunosuppressant** -**Cyclosporine (Cyclosporine)**: Used for anti-rejection after organ transplantation. -**Tacrolimus (Tacrolimus)** Grapefruit juice may increase the risk of nephrotoxicity. --- ### **4. Antiarrhythmic drugs** -**Amiodarone (Amiodarone)** -**Dronedarone (Dronedarone)** --- ### **5. Anxiolytics/antidepressants** - * *Butyrpirone (Buspirone)** -**Sertraline (Sertraline)**(some studies suggest that it may be affected) -**Trazodone (Trazodone)** --- ### **6. Anti-infective drugs** -**Erythromycin (Erythromycin)** -**Clarithromycin (Clarithromycin)** -**Ritonavir (Ritonavir)**(anti-HIV drug) --- ### **7. Other drugs** -**Sildenafil (Sildenafil, "Viagra”)**: May enhance side effects (headache, low blood pressure). -**Carbamazepine (Carbamazepine)**(antiepileptic drug): Increases the risk of dizziness or drowsiness. -**Oxycodone (Oxycodone)**: May enhance the analgesic effect and the risk of respiratory depression. --- ###**Key tips** -**Dosage and individual differences**: A small amount of grapefruit juice may have little effect on some drugs, but drinking in large quantities or frequently has a higher risk. -**Time factor**: Even if taken at intervals of several hours, the effects of grapefruit juice may last for more than 24 hours. -**Alternative options**: Oranges, citrus and other fruits are usually safe, but you need to consult a doctor. **Recommendation**: If you are taking prescription drugs, please read the drug instructions carefully or consult your doctor/pharmacist to confirm whether you need to avoid grapefruit juice.