SAFE — No Known Interaction
🟢 SAFE — Levothyroxine and Grapefruit can be taken together safely.
Evidence level: MODERATE
You can safely consume Grapefruit while taking Levothyroxine. No interaction has been documented.
No clinically significant interaction between Levothyroxine and Grapefruit has been identified in medical literature.
No dietary restrictions needed when combining Levothyroxine with Grapefruit. Maintain a balanced diet with consistent eating patterns to keep Levothyroxine working at its best. If you notice any digestive changes, mention them at your next appointment.
Take levothyroxine first thing in the morning on an empty stomach, 30-60 minutes before food. Take all other supplements and medications at least 4 hours later.
Higher risk for: elderly with cardiac conditions, those with adrenal insufficiency, recent thyroid dose adjustments, concurrent calcium/iron/antacid use (absorption interference), or narrow therapeutic index sensitivity.
Thyroid medication absorption may be affected by Grapefruit. Watch for signs of reduced thyroid medication effectiveness: increased fatigue, weight gain, feeling cold, constipation, dry skin, hair thinning, or brain fog. Conversely, if the interaction boosts absorption: nervousness, rapid heartbeat, weight loss, tremors, or heat intolerance. Take thyroid medication on an empty stomach, at least 30-60 minutes before other supplements. When to seek emergency help: Chest pain, very rapid or irregular heartbeat, severe shortness of breath, or signs of thyroid storm (high fever, extreme agitation, racing heart).
No urgent need to discuss, but always keep your doctor informed of your full supplement and medication list. An up-to-date list helps them make the best treatment decisions.
Safe combination. No dietary restrictions needed. Maintaining a consistent diet helps ensure predictable supplement and medication performance.
You can safely consume Grapefruit while taking Levothyroxine. No interaction has been documented.
Take levothyroxine first thing in the morning on an empty stomach, 30-60 minutes before food. Take all other supplements and medications at least 4 hours later.
Thyroid medication absorption may be affected by Grapefruit. Watch for signs of reduced thyroid medication effectiveness: increased fatigue, weight gain, feeling cold, constipation, dry skin, hair thinning, or brain fog. Conversely, if the interaction boosts absorption: nervousness, rapid heartbeat, weight loss, tremors, or heat intolerance. Take thyroid medication on an empty stomach, at least 30-60 minutes before other supplements. When to seek emergency help: Chest pain, very rapid or irregular heartbeat, severe shortness of breath, or signs of thyroid storm (high fever, extreme agitation, racing heart).
Safe combination. No dietary restrictions needed. Maintaining a consistent diet helps ensure predictable supplement and medication performance.
No urgent need to discuss, but always keep your doctor informed of your full supplement and medication list. An up-to-date list helps them make the best treatment decisions.
Or browse the full interaction database (121,000+ pairs).