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Dextromethorphan + Bupropion: Brands, Price & Uses in Bangladesh
Dextromethorphan + Bupropion is an oral combination product containing dextromethorphan (an NMDA receptor antagonist and sigma-1 receptor agonist) and bupropion (which here also acts as a CYP2D6…
About Dextromethorphan + Bupropion
Indications of Dextromethorphan + Bupropion
Dextromethorphan + Bupropion is an oral combination product containing dextromethorphan (an NMDA receptor antagonist and sigma-1 receptor agonist) and bupropion (which here also acts as a CYP2D6 inhibitor to raise dextromethorphan exposure). It represents a non-monoaminergic mechanism distinct from traditional antidepressants.
Established/FDA-Approved Uses
- Major depressive disorder (MDD) in adults
- Agitation associated with dementia due to Alzheimer's disease in adults (as scheduled, ongoing treatment; Dextromethorphan + Bupropion is not indicated for as-needed/"prn" use in this population)
Dextromethorphan + Bupropion has not been shown to be effective, and is not indicated, for anxiety disorders, cough suppression, or any use in patients under 18 years of age. It should be prescribed only for its approved indications, under medical supervision.
Dosage & Administration of Dextromethorphan + Bupropion
Dosing of Dextromethorphan + Bupropion differs by indication and is titrated over the first 1-2 weeks of treatment.
| Indication/Population | Dose | Notes |
|---|---|---|
| Adults - Major depressive disorder | One tablet (45 mg/105 mg) once daily (morning) for the first 3 days, then increase to one tablet twice daily, at least 8 hours apart, from day 4 onward | Maximum 2 tablets (90 mg/210 mg) per 24 hours |
| Adults - Agitation associated with Alzheimer's disease dementia | Lower starting dose once daily for the first week, increased to twice daily (at least 8 hours apart) in the second week, with further increase to the standard twice-daily dose from around day 15 based on response and tolerability | Titration schedule and target dose are determined by the prescriber; not for as-needed use |
| Moderate renal impairment | Reduced to once-daily dosing | Severe renal impairment/end-stage renal disease: not recommended (not adequately studied) |
| Known CYP2D6 poor metabolizers or concurrent strong CYP2D6 inhibitor use | Reduced to once-daily dosing | Higher dextromethorphan exposure expected; see Interactions |
| Moderate-to-severe hepatic impairment | Not recommended | Bupropion exposure is significantly increased |
| Children/adolescents | Not approved | Safety and efficacy not established (see Pediatric Uses) |
Tablets of Dextromethorphan + Bupropion should be swallowed whole with water and must not be crushed, split, or chewed, as this could increase the rate of drug release. It may be taken with or without food; avoid dosing close to bedtime because of the risk of insomnia.
Side Effects of Dextromethorphan + Bupropion
Side effects of Dextromethorphan + Bupropion reported in clinical studies include:
Common
- Dizziness
- Headache
- Diarrhea
- Somnolence
- Dry mouth
- Sexual dysfunction
- Hyperhidrosis (excessive sweating)
- Dyspepsia
- Insomnia, anxiety, or agitation (bupropion-related activation)
Less Common
- Tremor
- Nausea, decreased appetite
- Blurred vision
- Palpitations
Rare/Serious
- Seizures (dose-dependent - see Precautions and Warnings)
- Suicidal thoughts or behavior, especially in patients under 25 years old
- Serotonin syndrome
- New or worsening psychosis, mania, hallucinations, delusions, or paranoia
- Marked increase in blood pressure
- Angle-closure glaucoma
- Hyponatremia
Patients should seek prompt medical attention for a seizure, chest pain, signs of an allergic reaction, confusion, hallucinations, or thoughts of self-harm.
Contraindications of Dextromethorphan + Bupropion
- Known hypersensitivity to dextromethorphan, bupropion, or any component of Dextromethorphan + Bupropion
- Seizure disorder, or any other condition that meaningfully increases seizure risk
- Current or prior diagnosis of bulimia or anorexia nervosa
- Abrupt discontinuation of alcohol, benzodiazepines, barbiturates, or other sedative-hypnotics
- Use of a monoamine oxidase inhibitor (MAOI), including linezolid or intravenous methylene blue, concurrently or within the preceding 14 days
- Concurrent use of any other product containing bupropion
See Precautions and Warnings for cautions and risk factors that do not amount to absolute contraindications.
Frequently Asked Questions about Dextromethorphan + Bupropion
What is Dextromethorphan + Bupropion used for?
Dextromethorphan + Bupropion is used to treat major depressive disorder (MDD) in adults and agitation associated with dementia due to Alzheimer's disease. It works through a non-monoaminergic mechanism involving NMDA receptor antagonism, different from most other antidepressants.
How is Dextromethorphan + Bupropion taken?
Dextromethorphan + Bupropion is taken as a tablet by mouth, swallowed whole with water, and must not be crushed, split, or chewed. Dosing usually starts once daily and is increased to twice daily (at least 8 hours apart) after the first few days, following your physician's instructions.
Can Dextromethorphan + Bupropion cause seizures?
Yes. The bupropion component of Dextromethorphan + Bupropion carries a dose-dependent seizure risk, which is why it is contraindicated in people with a seizure disorder, a history of bulimia or anorexia nervosa, or recent abrupt discontinuation of alcohol or certain sedatives, and should be used cautiously with other drugs that lower seizure threshold.
Can I take Dextromethorphan + Bupropion if I am pregnant or breastfeeding?
Dextromethorphan + Bupropion is not recommended during pregnancy, as animal studies have shown potential harm to the fetus; it should be used only if a physician determines the benefit clearly outweighs the risk. Breastfeeding is not recommended during treatment because the bupropion component passes into breast milk. Always consult your physician.
Can Dextromethorphan + Bupropion be combined with antidepressants like SSRIs?
Combining Dextromethorphan + Bupropion with other serotonergic medicines such as SSRIs, SNRIs, or triptans can increase the risk of a serious condition called serotonin syndrome, and Dextromethorphan + Bupropion must never be combined with an MAOI or used within 14 days of stopping one. Discuss all your current medicines with your physician before starting Dextromethorphan + Bupropion.
What should I do if I miss a dose or take too much Dextromethorphan + Bupropion?
If you miss a dose, take it as soon as you remember unless it is close to your next scheduled dose; do not double up. If you suspect you have taken too much Dextromethorphan + Bupropion, seek immediate medical attention or contact emergency services or a poison control center right away, as overdose can cause seizures and other serious effects.
Disclaimer
The information provided is accurate to the best of our knowledge, but it does not replace professional medical advice. We cannot guarantee its completeness or accuracy, and the absence of specific information about a drug should not be taken as an endorsement. We are not responsible for any consequences arising from this information, so please consult a healthcare professional for any concerns or questions.