Drug interactions are changes in the effects of drugs when taken together with other drugs or with certain foods and drinks. To find out more about the types and effects of drug interactions, see the following review. Drug interactions can cause drugs to be less effective, increase drug content reactions, or cause unexpected side effects. Under certain circumstances, the effects of drug interactions can even be life-threatening. Impact of Drug Interactions The following are various effects of drug interactions based on the type of interaction : Drug interactions with drugs. This interaction occurs when a person consumes two or more drugs simultaneously. The more drugs consumed, the higher the risk of interactions that might occur. Drug interactions with drugs can cause a decrease in the ability of the drug to cure the disease or increase the risk of drug side effects. For example, you take two types of drugs that can cause drowsiness, so you will tend to experience double drowsine...