Drug Interaction Checkers

Check for interactions between medications, herbals, vitamins, and alcohol. Listed tools are free to use and with few exceptions do not require registration. Always ask your doctor or pharmacist about possible interactions before starting a new medication.

Subscription Services

  • Lexi-Interact
    Leading provider of interaction data for healthcare professionals.
    lexi.com - Subscription
  • Micromedex Drug Interactions
    Drug interaction lookup service from IBM/Truven. Institutional access only.
    ibm.com - Subscription

Additional Resources