Bupropion HCL ER 300mg

Generic For: Wellbutrin XL

Bupropion HCL ER 300mg is the extended-release form of bupropion, sold under the brand name Wellbutrin XL. It is FDA-approved to treat major depressive disorder (MDD) and to help prevent seasonal affective disorder (SAD). After a licensed provider reviews your prescription, your order ships from a licensed U.S. pharmacy.

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Bupropion HCL ER (Wellbutrin XL) is an atypical antidepressant used for major depressive disorder and seasonal affective disorder.

Bupropion HCL ER 300mg Quick Facts

Drug classAminoketone antidepressant
TreatsMajor depressive disorder, seasonal affective disorder
FormTablet
Typical dosingTake 1 tablet by mouth daily
Prescription requiredYes — prescription only

What Is Bupropion HCL ER 300mg?

Bupropion HCL ER is a once-daily extended-release antidepressant tablet, available as the brand Wellbutrin XL and as a generic. Unlike many antidepressants, it works primarily on norepinephrine and dopamine rather than serotonin. It is prescribed to treat major depressive disorder and to prevent seasonal episodes of depression in adults. Because it is extended-release, the tablet should be swallowed whole and not crushed, chewed, or split.

What Does Bupropion HCL ER 300mg Treat?

Major depressive disorder (MDD)
Prevention of seasonal affective disorder (SAD)
Depression that has not responded well to serotonergic antidepressants (per provider judgment)
Smoking cessation (a different bupropion formulation, Zyban, is approved for this use)

Bupropion HCL ER 300mg Dosage

MDD: Start 150 mg by mouth once daily in the morning; may increase to 300 mg once daily after 4 days.
SAD prevention: Start 150 mg once daily in autumn; may increase to 300 mg once daily after 1 week; continue through winter season.
Maximum dose: 450 mg once daily (MDD only). Swallow tablets whole.

Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.

Bupropion HCL ER 300mg Side Effects

Common side effects

  • Dry mouth
  • Insomnia
  • Headache
  • Nausea
  • Dizziness
  • Constipation
  • Sweating
  • Agitation or anxiety

Serious side effects

Stop taking this medication and seek medical attention right away if you experience:

  • Seizures
  • Worsening depression or suicidal thoughts or behavior
  • Severe allergic reaction (rash, hives, swelling, trouble breathing)
  • Significant increase in blood pressure
  • Unusual mood changes, hallucinations, or confusion
  • Angle-closure glaucoma symptoms (eye pain, vision changes)

Warnings & Interactions

Boxed warning: increased risk of suicidal thoughts and behaviors in young adults; monitor closely
Contraindicated in patients with a seizure disorder
Contraindicated in patients with current or prior anorexia or bulimia
Do not use with or within 14 days of MAO inhibitors
Do not stop alcohol or sedatives abruptly while taking bupropion (seizure risk)
Do not combine with other bupropion-containing products (e.g., Zyban)
May raise blood pressure; monitor, especially with nicotine replacement therapy

Tell your prescriber about all medications, supplements, and health conditions before starting bupropion hcl er 300mg.

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Frequently Asked Questions

What is bupropion HCL ER used for?

Bupropion HCL ER is FDA-approved to treat major depressive disorder and to prevent seasonal affective disorder in adults. Your provider may also consider it when other antidepressants haven't been a good fit.

Is bupropion HCL ER the same as Wellbutrin XL?

Yes. Bupropion HCL ER is the generic name for the extended-release tablet sold under the brand name Wellbutrin XL. Both contain the same active ingredient and are taken once daily.

Do I need a prescription for bupropion HCL ER 300mg?

Yes, bupropion is a prescription-only medication in the U.S. A licensed provider must evaluate whether it is appropriate for you before it can be dispensed.

How does ordering and shipping work?

After you place your order, a licensed provider or pharmacist reviews your prescription and health information. Once approved, your medication ships from a licensed U.S. pharmacy directly to your address.

How should I take bupropion HCL ER?

Take it once daily in the morning, swallowing the tablet whole — do not crush, chew, or split it. Taking it earlier in the day can help reduce trouble sleeping.

What should I avoid while taking bupropion HCL ER?

Avoid taking other bupropion products at the same time, and do not stop heavy alcohol or sedative use abruptly, as this can raise seizure risk. Tell your provider about all medications you take, especially MAO inhibitors.

How long does bupropion HCL ER take to work?

Some people notice improvement in sleep, energy, or appetite within 1–2 weeks, but full antidepressant effects often take 4–6 weeks. Keep taking it as prescribed and follow up with your provider.