Moclobemide is a reversible monoamine oxidase inhibitor (MAOI) drug primarily used to treat depression and social anxiety. Reversible selective MAOIs such as moclobemide are widely underprescribed due to the misconception that the side effect profile of moclobemide is analogous to that of the irreversible and non-selective MAOIs. MAOIs such as moclobemide are reported to have a relatively fast onset of action compared to other antidepressant drug classes, and have good long-term tolerability in terms of side effects. Moclobemide has fewer interactions than irreversible MAOIs. Cimetidine, however, causes a significant rise in moclobemide levels and therefore if the combination is used, lower doses of moclobemide have been recommended. Moclobemide also interacts with pethidine/meperidine, and dextropropoxyphene.