Bupropion is an atypical antidepressant and smoking cessation aid that functions as a norepinephrine-dopamine reuptake inhibitor. It increases the availability of norepinephrine and dopamine in the brain producing effects that can improve mood and reduce nicotine withdrawal. The medication is also prescribed for seasonal affective disorder and for depression associated with bipolar disorder when used cautiously. Its therapeutic action occurs by blocking the reuptake of these monoamine neurotransmitters thereby enhancing their signaling in specific brain circuits. The sustained elevation of norepinephrine and dopamine is thought to underlie the reductions in depressive symptoms and cigarette cravings. Because it does not affect serotonin or gaba receptors its side effect profile differs from many other antidepressants. Clinical studies have shown that the drug can achieve abstinence rates comparable to nicotine replacement therapy in patients motivated to quit smoking.

Bupropion is a prescription medication classified as an atypical antidepressant and smoking cessation aid. Its primary therapeutic role involves increasing the availability of norepinephrine and dopamine in the brain. The drug functions as a norepinephrine dopamine reuptake inhibitor that blocks the transporter proteins for these neurotransmitters. By reducing reuptake the medication prolongs the signaling of norepinephrine and dopamine between neurons. This enhanced neurotransmission contributes to improved mood regulation and reduced nicotine cravings. The increased dopamine activity also helps modulate reward pathways that are involved in addictive behaviors. Pharmacologically the compound exhibits mild antagonism at nicotinic acetylcholine receptors which further supports its use in smoking cessation. Overall the medication's mechanism of action relies on boosting monoamine neurotransmission to achieve its clinical effects.

The most common side effects often include mild fatigue and occasional headache. Some people may experience temporary nausea or lightheadedness after treatment. A small number of individuals report brief dizziness that resolves quickly. In many cases these effects are short lived and do not require intervention. Monitoring for persistent symptoms is part of routine observations. Overall the occurrence of serious complications remains low.

Headache is frequently reported as a side effect. Fatigue often accompanies treatment. Nausea can occur without warning. Diarrhea is observed in some patients. Dizziness may affect balance temporarily. Dry mouth is a common complaint. Difficulty sleeping can be experienced. Mild skin rash may appear infrequently.