Drug/Laboratory Test Interactions Persons taking most antibiotics, methotrexate, and pyrimethamine invalidate folic acid and vitamin B 12 diagnostic blood assays

Statins (cholesterol drugs): examples include lovastatin (Mevacor), atorvastatin (Lipitor), simvastatin (Zocor), simvastatin/ezetimibe combination Interaction: Grapefruit can increase blood levels of these statins, raising the risk of muscle toxicity, known as rhabdomyolysis Safer alternatives include: rosuvastatin (Crestor), fluvastatin (Lescol), pravastatin (Pravachol), Calcium channel blockers (blood pressure drugs): examples include amlodipine (Norvasc), diltiazem (Cardiazem, Tiazac), felodipine (Plendil), nifedipine XL (Adalat XL), verapamil (Isoptin SR, Verelan) Interaction: Increased drug levels may cause hypotension, dizziness or edema Antiarrhythmics (atrial fibrillation drugs): examples include amiodarone (Cordarone), disopyramide (Norpace) Interaction: Increased risk of QT prolongation, arrhythmia and other side effects
Ozempic, Wegovy, Saxenda and Trulicity remain approved by the U.S
If you have specific deficiencies, talk to your provider before supplementing