Important: This is informational content only. Always consult Dr. Ambrish Singal or your psychiatrist before starting, stopping, or changing any medication.
What is Bupropion?
Bupropion is unique among antidepressants as it works on dopamine and norepinephrine without affecting serotonin. It is the only antidepressant that does not cause sexual dysfunction or weight gain, and also aids smoking cessation.
How It Works
Inhibits reuptake of dopamine and norepinephrine. Does not affect serotonin, which explains the absence of sexual side effects common with SSRIs/SNRIs.
Uses
How This Drug Starts Working
Effects typically begin within 1-4 weeks depending on the condition being treated. Full therapeutic effect usually takes 4-8 weeks.
Week-by-Week Timeline
Week 1: Medication reaching therapeutic blood levels. Some initial side effects may appear as body adjusts.
Week 2-3: Initial therapeutic effects beginning. Side effects often settling.
Week 4-6: Significant therapeutic benefit in most patients.
Week 8+: Full effect established. Treatment response can be properly assessed.
What Changes First?
Physical symptoms (sleep, appetite, energy) typically improve before emotional and cognitive symptoms. Others may notice improvement before you feel it yourself.
Why Does It Take Time?
Psychiatric medications work by gradually rebalancing brain chemistry and neural circuits. Unlike pain medications that block a sensation, these drugs help your brain rebuild healthy patterns — which requires time.
Complete Dosage Guide
How to Take
Take exactly as prescribed by your doctor. Maintain consistent timing each day.
Starting Dose
Your doctor will determine the appropriate starting dose based on your condition, age, weight, and other factors.
Dose Increases
Dose adjustments are made gradually based on your response and side effects. Follow your doctor's instructions for any changes.
Maximum Dose
Your doctor will not exceed safe maximum doses. Never take more than prescribed.
When to Take
Take at the same time daily for best results. Ask your doctor whether morning or evening is better for your specific medication.
If You Miss a Dose
If you miss a dose, take it as soon as you remember unless close to your next dose. Never double up. Contact your doctor if you miss multiple doses.
Food & Drink
Ask your doctor or pharmacist about specific food interactions for your medication.
How Long to Take
Duration of treatment varies by condition. Never stop medication without discussing with your doctor first — some medications require gradual tapering.
Dosage by Age Group
adult
Depression: Start 150mg SR once daily. After 3 days, 150mg twice daily. Maximum: 450mg/day. Smoking: 150mg for 3 days, then 150mg twice daily.
child
Not FDA-approved for children. Sometimes used off-label.
elderly
Start 75-100mg daily. Titrate slowly.
Special Populations
Pregnancy
Category C. One of the better-studied antidepressants in pregnancy. Discuss with doctor.
Kidney Conditions
Reduce dose and frequency in renal impairment.
Liver Conditions
Reduce dose to 75mg/day in severe hepatic impairment.
Side Effects
Common
- Insomnia
- Dry mouth
- Headache
- Nausea
- Dizziness
- Agitation
- Tremor
Serious
- Seizures (dose-related, risk increases >450mg/day)
- Psychosis (rare)
- Hypertension
- Anaphylaxis
- Suicidal ideation
What You Should Know
Overdose Risks
Seizures are the primary concern. May also cause hallucinations, tachycardia, and loss of consciousness. Fatalities reported with large overdoses.
Safe Discontinuation
Generally can be stopped without tapering for short-term use. For prolonged use, taper over 1-2 weeks.