A drug interaction occurs when the effect of a particular drug is positively or negatively altered when it is taken simultaneously with another drug, food or a supplement. The Drug Interactions Checker can be consulted in conjunction with the OTC Drug Tool and Symptoms Checker.

The Drug Interactions Checker explains and lists the number of medications in the database that are known to interact with a drug, the severity of the interaction - major, moderate and minor - and the manner in which to manage the interaction. The Drug Interactions Checker also provides information on drug interactions with food/lifestyle and diseases.

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