How Long Does It Take for Wellbutrin to Work?

Starting an antidepressant can come with an understandable question: When should you expect to feel different? With Wellbutrin, the answer depends on which symptoms you are tracking and how your body responds to treatment.

So, how long does it take for Wellbutrin to work? Some people may notice changes in sleep, energy, or appetite within the first one to two weeks. Improvement in depressed mood or loss of interest can take longer, sometimes six to eight weeks. MedlinePlus notes that it may take four weeks or longer to feel the full benefit of bupropion.

What Is Wellbutrin?

Wellbutrin is a brand name for bupropion, a prescription antidepressant. Bupropion is used to treat major depressive disorder, and some extended-release forms are approved to prevent seasonal affective disorder. Its exact antidepressant mechanism is not fully understood, but it is thought to affect the brain chemicals norepinephrine and dopamine.

Wellbutrin is available in immediate-release, sustained-release, and extended-release formulations. The way a dose is released into the body differs between these formulations, so patients should follow their prescription instructions carefully rather than changing how or when they take the medication on their own.

How Long Does It Take for Wellbutrin to Work?

Wellbutrin begins affecting the body shortly after treatment starts, but that does not mean depression symptoms will improve right away. With extended-release bupropion, steady blood levels are reached in about eight days. The clinical response generally develops more gradually.

During the first one to two weeks, changes in energy, appetite, or sleep may be among the first signs of improvement. Mood, motivation, and interest in activities can require several additional weeks. Response varies from person to person, so one person’s timeline may not predict another’s.

Continue taking Wellbutrin as prescribed even if you do not notice immediate improvement. Do not increase, decrease, or stop your medication without discussing the change with your healthcare provider.

How Long Does Wellbutrin Stay in Your System?

If you are wondering how long does Wellbutrin stay in your system, the answer involves both bupropion and the substances your body produces when it breaks the medication down, known as metabolites.

Bupropion has an average elimination half-life of about 21 hours. Some active metabolites have longer half-lives, including approximately 33 to 37 hours. This means bupropion and its metabolites can remain in the body for several days after the last dose. Kidney function, liver function, other medications, and individual differences can affect how quickly they are eliminated.

This should not be used as a precise estimate for drug testing or as a reason to stop treatment before a medical procedure. Ask your healthcare provider or pharmacist if you need information about your individual situation.

When Should You Review Treatment With Your Provider?

Some common bupropion side effects include trouble sleeping, dry mouth, nausea, dizziness, anxiety or agitation, constipation, headache, and increased sweating. Tell your healthcare provider if side effects are persistent or difficult to manage.

Bupropion also has important cautions. It can increase the risk of seizures, particularly in people with certain risk factors. It should not be used by people with a seizure disorder or a current or past diagnosis of anorexia nervosa or bulimia. It is also contraindicated in certain situations involving MAO inhibitors or abrupt withdrawal from alcohol, benzodiazepines, barbiturates, or anti-seizure medications.

Contact your healthcare provider if your symptoms are worsening, you experience major changes in mood or behavior, or you do not feel the medication is helping after an appropriate trial. Seek urgent medical help for suicidal thoughts, a seizure, or other severe symptoms.

If your provider prescribes Wellbutrin, Canada Pharmacy lists Wellbutrin and generic bupropion as prescription medications and requires a doctor's prescription for ordering.

Wellbutrin can take time to produce its full antidepressant benefit. Keeping track of your mood, sleep, energy, side effects, and other changes can give you and your provider useful information when reviewing treatment. This article is for general educational purposes and does not replace professional medical advice.

FAQs

Can Wellbutrin work in the first week?

Some people may notice early changes in sleep, energy, or appetite during the first one to two weeks, but improvements in depressed mood and interest may take several weeks.

How long before Wellbutrin reaches a steady level in the body?

Extended-release bupropion reaches steady-state blood concentrations in about eight days with regular dosing. This is different from the time needed to experience the full antidepressant benefit.

What if Wellbutrin is not working after several weeks?

Speak with your healthcare provider. They can review your symptoms, adherence, side effects, dose, other medications, and whether the current treatment remains appropriate. Do not adjust the dose yourself.

Does Wellbutrin leave your body as soon as you stop taking it?

No. Bupropion has an average half-life of about 21 hours, while some active metabolites have half-lives of up to approximately 37 hours. Elimination therefore occurs gradually over several days and may vary between individuals.