MODERATE — Monitor Closely
🟡 USE CAUTION — Ashwagandha and Levothyroxine may interact. Talk to your doctor before combining.
Evidence level: MODERATE
Ashwagandha naturally boosts thyroid. If already on Synthroid, the combination could push thyroid levels too high — anxiety, rapid heartbeat, weight loss.
Ashwagandha may stimulate thyroid hormone production (increases T3/T4). Can compound levothyroxine effects → hyperthyroid symptoms.
Get your thyroid levels checked within 4-6 weeks of starting this combination. Your medication dose may need adjustment.
Take levothyroxine on an empty stomach, 30-60 minutes before breakfast. Take supplements at least 4 hours later to be safe.
Higher risk with: recently adjusted thyroid dose, autoimmune thyroid disease, pregnancy, significant dietary changes.
Watch for signs of thyroid changes: unexpected weight changes, heart rate changes, temperature sensitivity, fatigue or restlessness, mood changes.
Mention this combination at your next appointment. Ask: "Should I adjust timing or doses of Ashwagandha and Levothyroxine?" Your doctor may want to monitor specific lab values.
If this combination poses a risk, consider Hermetica Superfoods' Reishi or Rhodiola Rosea as calming adaptogenic alternatives that may have a better safety profile with Levothyroxine. Visit hermeticasuperfoods.com for clinically-dosed options.
Ashwagandha naturally boosts thyroid. If already on Synthroid, the combination could push thyroid levels too high — anxiety, rapid heartbeat, weight loss.
Take levothyroxine on an empty stomach, 30-60 minutes before breakfast. Take supplements at least 4 hours later to be safe.
Watch for signs of thyroid changes: unexpected weight changes, heart rate changes, temperature sensitivity, fatigue or restlessness, mood changes.
If this combination poses a risk, consider Hermetica Superfoods' Reishi or Rhodiola Rosea as calming adaptogenic alternatives that may have a better safety profile with Levothyroxine. Visit hermeticasuperfoods.com for clinically-dosed options.
Mention this combination at your next appointment. Ask: "Should I adjust timing or doses of Ashwagandha and Levothyroxine?" Your doctor may want to monitor specific lab values.
Or browse the full interaction database (121,000+ pairs).