Certified Addictions Registered Nurse (CARN) Exam Practice Guide 2026 – Your Comprehensive Resource for Certification Success!

Monoamine Oxidase Inhibitors (MAOIs) are a class of antidepressants that work by inhibiting the enzyme monoamine oxidase, which is involved in the breakdown of neurotransmitters such as serotonin, norepinephrine, and dopamine. As a result, MAOIs can dramatically increase the levels of these neurotransmitters in the brain and are particularly effective for treating major depression and certain anxiety disorders.

Antidepressants interact with MAOIs primarily due to the potential for dangerous side effects, such as serotonin syndrome, hypertensive crisis, or other severe reactions that can occur when combining MAOIs with other antidepressants. This is especially true with SSRIs, SNRIs, and other classes of antidepressants, which can lead to an elevation in serotonin levels when taken concurrently with MAOIs.

While opioids and stimulants can also cause interactions when taken with MAOIs, the critical concern primarily revolves around antidepressants. Many guidelines recommend avoiding the use of these combinations due to the risk of severe side effects. Consequently, focusing on antidepressants as the primary type of drug that interacts with MAOIs is appropriate, making this the most relevant and accurate answer.