MODERATE — Monitor Closely
TIMING CRITICAL — separate by at least 2 hours
Evidence level: STRONG
Iron supplements reduce levodopa absorption by up to half, making your Parkinsons medication less effective.
Iron chelates levodopa in the GI tract, forming complexes that reduce absorption by 30-50%. This can worsen Parkinsons symptoms.
Take iron supplements at least 2 hours before or after levodopa. Morning levodopa, afternoon/evening iron is a common strategy.
Take Iron with food for optimal absorption. Space at least 2 hours from Levodopa to minimize any chelation or absorption interference. Minerals are notorious for binding to other compounds in the gut — timing separation is your best defense.
Simultaneous dosing, high-dose iron supplementation, iron-rich meals with levodopa
Worsening Parkinsons symptoms (tremor, rigidity, slowness), reduced medication effectiveness
Discuss optimal timing of iron supplementation. Iron needs may increase due to dietary restrictions common in PD.
Discuss safer alternatives with your healthcare provider. They can recommend substitutions based on your specific health goals while minimizing interaction risks. Always bring a complete list of everything you take to your appointments.
Iron supplements reduce levodopa absorption by up to half, making your Parkinsons medication less effective.
Take Iron with food for optimal absorption. Space at least 2 hours from Levodopa to minimize any chelation or absorption interference. Minerals are notorious for binding to other compounds in the gut — timing separation is your best defense.
Worsening Parkinsons symptoms (tremor, rigidity, slowness), reduced medication effectiveness
Discuss safer alternatives with your healthcare provider. They can recommend substitutions based on your specific health goals while minimizing interaction risks. Always bring a complete list of everything you take to your appointments.
Discuss optimal timing of iron supplementation. Iron needs may increase due to dietary restrictions common in PD.
Or browse the full interaction database (121,000+ pairs).