Depoxitein Effect
Doc for premature ejaculation
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dapoxetine premature ejaculation
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I now have comprehensive information. Here is a complete clinical overview:
Dapoxetine (Dapoxetine HCl) — Use in Premature Ejaculation
Note: "Depoxitein" appears to be a trade/phonetic rendering of Dapoxetine.
What Is It?
Dapoxetine hydrochloride is a short-acting, rapid-onset SSRI specifically developed as an on-demand treatment for premature ejaculation (PE). It is the first and only medication approved specifically for PE in over 50 countries (marketed as Priligy, among others). It has not received FDA approval in the United States, where SSRIs used for PE are prescribed off-label.
Mechanism of Action
Dapoxetine blocks axonal reuptake of serotonin (5-HT) from the synaptic cleft via 5-HT transporters, enhancing 5-HT neurotransmission and stimulating postsynaptic 5-HT receptors. The resulting increase in central serotonergic tone delays the ejaculatory reflex. Its short half-life distinguishes it from other SSRIs and makes it suitable for on-demand (not daily) dosing.
Dosing
| Dose | Timing | Notes |
|---|---|---|
| 30 mg (starting dose) | 1–2 hours before intercourse | Preferred initial dose |
| 60 mg (escalation) | 1–2 hours before intercourse | If 30 mg is inadequate and tolerated |
Efficacy
From RCTs (dapoxetine 30 mg or 60 mg vs. placebo):
- 2.5-fold (30 mg) and 3.0-fold (60 mg) increase in intravaginal ejaculatory latency time (IELT)
- Significant improvements in ejaculatory control, sexual satisfaction, and reduced distress from the first dose
- Effective in both lifelong PE and acquired PE
- Effective and well-tolerated in men with comorbid erectile dysfunction using PDE5 inhibitors (no significant drug-drug interactions reported)
- Combination with behavioral therapy is more effective than dapoxetine alone
Side Effects
Dose-dependent and generally uncommon:
| Side Effect | Frequency |
|---|---|
| Nausea | Most common |
| Diarrhea | Common |
| Headache | Common |
| Dizziness | Common |
- Discontinuation due to side effects: ~4% (30 mg), ~10% (60 mg)
- No increased risk of suicidal ideation
- No significant withdrawal syndrome on abrupt cessation (unlike other SSRIs)
- Lower side effect incidence than daily-dosed SSRIs
Practical Considerations
- High real-world discontinuation rate: ~87% at 12 months, mainly due to cost and lack of spontaneity with on-demand use
- ~45% of men report satisfaction with 30 mg; satisfaction closely correlates with treatment response
- No clinically significant interactions with PDE5 inhibitors (sildenafil, tadalafil, vardenafil)
Comparison with Other SSRIs for PE
| Drug | Dosing | IELT Increase | Status |
|---|---|---|---|
| Dapoxetine 30–60 mg | On-demand | 2.5–3× | Approved for PE (not USA) |
| Paroxetine 10–40 mg | Daily (off-label) | ~8.8× | Strongest ejaculation delay |
| Sertraline 50–200 mg | Daily (off-label) | Moderate | Off-label |
| Fluoxetine 20–40 mg | Daily (off-label) | Moderate | Off-label |
| Clomipramine 12.5–50 mg | Daily or on-demand (off-label) | Moderate | Off-label (TCA) |
Paroxetine shows the strongest overall ejaculation delay in meta-analyses, but dapoxetine's on-demand profile and lower withdrawal risk make it preferable for many patients.
Non-Pharmacologic Options (Adjuncts)
- Behavioral techniques: Stop-start method, squeeze technique, sensate focus
- Pelvic floor muscle rehabilitation
- Psychosexual counseling: Especially for acquired PE with interpersonal components
- Short-term effect of behavioral therapy alone: 45–65%
A 2025 systematic review and meta-analysis (PMID: 41020367) confirmed that dapoxetine combined with non-pharmacological approaches improves outcomes in lifelong PE beyond either treatment alone.
Sources: Campbell-Walsh-Wein Urology, 11th ed. | Kaplan & Sadock's Comprehensive Textbook of Psychiatry | Goldman-Cecil Medicine
How to use paroxatine as on demand
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paroxetine "on demand" "premature ejaculation"
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Here is the evidence-based answer:
Paroxetine On-Demand for Premature Ejaculation
Short Answer
Paroxetine can be used on-demand, but this is less effective than daily dosing. The standard textbook recommendation is daily dosing — on-demand use is a secondary option with modest benefit.
On-Demand Protocol
| Parameter | Details |
|---|---|
| Dose | 20–40 mg |
| Timing | 3–6 hours before anticipated intercourse |
| Efficacy | Modest — substantially less ejaculatory delay than daily dosing |
| Regulatory status | Off-label (for PE in general) |
How It Compares to Daily Dosing
- Daily paroxetine (10–40 mg/day): Produces the strongest ejaculation delay of all SSRIs — approximately 8.8-fold increase in IELT over baseline (meta-analysis data). Full effect takes 2–3 weeks.
- On-demand paroxetine (20–40 mg, 3–6 hrs before sex): Modestly efficacious but significantly less effective than the daily regimen in most studies.
A 2021 systematic review and meta-analysis (PMID: 34492139) compared on-demand paroxetine vs. on-demand tramadol, confirming that on-demand paroxetine does provide measurable benefit, though modest.
Combination Strategy (Best of Both)
Campbell-Walsh-Wein Urology recommends a combined approach for better results:
On-demand treatment may be combined with either an initial trial of daily treatment or concomitant low-dose daily treatment.
Practical approach:
- Start paroxetine 10–20 mg daily for 2–3 weeks (build up serotonergic tone)
- Add a 20–40 mg on-demand dose 3–6 hours before intercourse as needed
This hybrid strategy captures the sustained benefit of daily dosing plus a pre-coital boost.
Important Cautions for Paroxetine
| Issue | Detail |
|---|---|
| Sperm DNA fragmentation | Paroxetine can induce abnormal sperm DNA fragmentation — caution in men trying to conceive |
| Withdrawal syndrome | Never stop daily paroxetine abruptly — taper gradually |
| GI bleeding risk | Increased with concurrent aspirin/NSAIDs |
| Bipolar disorder | Avoid in men with history of bipolar depression (risk of hypomania/agitation) |
| Adolescents | Caution in men ≤18 years — small risk of suicidal ideation with SSRIs |
| Libido/ED | Rarely reported in non-depressed PE patients, but possible |
Bottom Line
If dapoxetine is available (approved in your country), it is the preferred on-demand option due to its pharmacokinetic profile (shorter half-life, faster onset, no withdrawal risk). Paroxetine on-demand is a reasonable alternative where dapoxetine is unavailable, taken 20–40 mg, 3–6 hours before sex, ideally combined with low-dose daily treatment for optimal effect.
— Campbell-Walsh-Wein Urology, 11th ed., Table 71.3 & Chapter 71
What is the treatment of choice for PE
Based on the detailed textbook content already in our context from the previous two searches, I can answer this directly without additional lookups.
Treatment of Choice for Premature Ejaculation (PE)
There is no single universal "treatment of choice" — guidelines recommend a stratified, multimodal approach based on PE subtype, patient preference, and comorbidities.
First-Line Treatments
1. Pharmacotherapy (Primary First-Line)
Daily SSRI — Paroxetine 10–40 mg/day is the most effective single pharmacologic agent:
- ~8.8-fold increase in IELT (strongest of all SSRIs in meta-analyses)
- Full effect in 2–3 weeks
- Off-label for PE, but high evidence level
On-demand Dapoxetine 30–60 mg (1–3 hrs before sex):
- Only drug approved specifically for PE (>50 countries)
- Effective from first dose (2.5–3× IELT increase)
- Preferred when on-demand use is desired
| Drug | Regimen | IELT Increase | Evidence |
|---|---|---|---|
| Paroxetine 10–40 mg | Daily | ~8.8× | High |
| Dapoxetine 30–60 mg | On-demand | 2.5–3× | High |
| Sertraline 50–200 mg | Daily | Moderate | High |
| Clomipramine 12.5–50 mg | Daily or on-demand | Moderate | High |
| Fluoxetine 20–40 mg | Daily | Moderate | High |
2. Topical Anesthetics (Co-First-Line for Lifelong PE)
- Lidocaine/prilocaine cream or spray — applied to glans 20–30 minutes before intercourse
- Reduces penile sensitivity → delays ejaculation
- High evidence level; no systemic side effects
- Suitable when patient prefers avoiding oral medications
3. Psychosexual/Behavioral Therapy (Essential Adjunct)
- Stop-start technique (Semans method)
- Squeeze technique (Masters & Johnson)
- Sensate focus exercises
- Pelvic floor muscle rehabilitation
- Short-term efficacy: 45–65%
- All men with PE should receive at minimum basic psychosexual education regardless of other treatment
By PE Subtype
| PE Type | Preferred Approach |
|---|---|
| Lifelong PE | Daily SSRI (paroxetine) ± behavioral therapy |
| Acquired PE | Treat underlying cause (e.g., ED → PDE5i first); add SSRI if needed |
| PE + comorbid ED | PDE5 inhibitor ± dapoxetine (safe combination, no drug interaction) |
| Natural variable / PE-like | Psychosexual education + behavioral therapy primarily |
Optimal Strategy: Combination Therapy
The best outcomes are consistently achieved by combining pharmacotherapy with behavioral/psychosexual therapy:
"In a prospective randomized trial, the combination of dapoxetine with behavioral therapy was more effective in treating lifelong PE patients than dapoxetine alone." — Kaplan & Sadock's Comprehensive Textbook of Psychiatry
Summary
| Clinical Scenario | Treatment of Choice |
|---|---|
| Best efficacy (daily) | Paroxetine 20 mg/day |
| Best on-demand | Dapoxetine 30–60 mg (where available) |
| Preferred overall | SSRI + behavioral therapy (combination) |
| Avoid systemic drugs | Topical lidocaine/prilocaine |
| PE + ED | PDE5i ± dapoxetine |
— Campbell-Walsh-Wein Urology, 11th ed. | Goldman-Cecil Medicine | Kaplan & Sadock's Comprehensive Textbook of Psychiatry
Clamipramine as on demand?
Based on the textbook content already retrieved in our previous sessions (Campbell-Walsh-Wein Urology, Table 71.3 and Chapter 71), I can answer this directly.
Clomipramine On-Demand for Premature Ejaculation
Protocol
| Parameter | Details |
|---|---|
| Drug class | Tricyclic antidepressant (TCA) — serotonin + noradrenaline reuptake inhibitor |
| Dose | 12.5–50 mg |
| Timing | 3–4 hours before intercourse |
| Evidence level | High |
| Status | Off-label for PE |
Key Points
Why Clomipramine Works On-Demand (Unlike Other SSRIs)
Clomipramine is unique among TCAs in that it has a significant serotonergic component — it inhibits 5-HT reuptake more potently than other TCAs. This gives it a relatively faster onset of ejaculatory delay compared to pure SSRIs on an on-demand basis.
It is the only antidepressant listed in Campbell-Walsh with both daily AND on-demand dosing schedules recommended at high evidence level:
| Dosing Mode | Dose | Timing |
|---|---|---|
| Daily | 12.5–50 mg | Once daily |
| On-demand | 12.5–50 mg | 3–4 hours before sex |
How It Compares to Other On-Demand Options
| Drug | Dose | Timing Before Sex | Efficacy | Evidence |
|---|---|---|---|---|
| Dapoxetine | 30–60 mg | 1–3 hrs | Best on-demand | High |
| Clomipramine | 12.5–50 mg | 3–4 hrs | Moderate | High |
| Paroxetine | 20–40 mg | 3–6 hrs | Modest | Moderate |
| Tramadol | 25–50 mg | 3–4 hrs | Modest | Low + addiction risk |
Clomipramine on-demand performs better than other SSRIs on-demand, but still less effective than daily SSRIs overall.
Cautions Specific to Clomipramine (TCA)
| Issue | Detail |
|---|---|
| Anticholinergic effects | Dry mouth, constipation, urinary retention, blurred vision |
| Sedation | Can cause drowsiness — relevant with 3–4 hr pre-coital timing |
| Cardiac | QTc prolongation risk — avoid in cardiac disease or with other QT-prolonging drugs |
| Orthostatic hypotension | More so than SSRIs |
| Overdose risk | TCAs have a narrow therapeutic window — dangerous in overdose |
| Sexual side effects | Possible ED, reduced libido at higher doses |
| Avoid in | Glaucoma, prostate enlargement, recent MI, epilepsy |
Bottom Line
Clomipramine 12.5–50 mg taken 3–4 hours before intercourse is a valid on-demand option for PE, supported by high-level evidence. It is particularly useful when:
- Dapoxetine is unavailable
- Patient prefers not to take a daily medication
- A TCA is otherwise clinically appropriate
Start at the lowest dose (12.5 mg) on-demand and titrate up based on response and tolerability. The anticholinergic side effect profile means it is generally less preferred than dapoxetine for on-demand use in otherwise healthy men.
— Campbell-Walsh-Wein Urology, 11th ed., Table 71.3
Which one is best on demand fornpr
Based on all the textbook data already in our context:
Best On-Demand Drug for PE
Dapoxetine — Clear Winner
| Feature | Dapoxetine | Clomipramine | Paroxetine |
|---|---|---|---|
| Dose | 30–60 mg | 12.5–50 mg | 20–40 mg |
| Timing before sex | 1–3 hrs | 3–4 hrs | 3–6 hrs |
| IELT increase | 2.5–3× | Moderate | Modest |
| Onset from 1st dose | ✅ Yes | ✅ Yes | ✅ Yes |
| Evidence level | High | High | Moderate |
| Approved for PE | ✅ Yes (50+ countries) | ❌ Off-label | ❌ Off-label |
| Withdrawal risk | ✅ None | ⚠️ Yes (TCA) | ⚠️ Yes |
| Cardiac risk | ✅ None | ⚠️ QTc prolongation | ✅ Low |
| Anticholinergic SE | ✅ None | ⚠️ Yes | ✅ None |
| Drug interactions | ✅ Minimal (safe with PDE5i) | ⚠️ Multiple | ⚠️ Some |
Why Dapoxetine Wins On-Demand
- Designed specifically for on-demand PE treatment — short half-life, rapid absorption, rapid elimination
- Shortest lead time — only 1–3 hours vs 3–6 hours for alternatives
- Effective from dose 1 with the best IELT improvement data
- Safest profile — no cardiac risk, no anticholinergic effects, no withdrawal on stopping
- No interaction with PDE5 inhibitors (sildenafil, tadalafil) — important since PE often coexists with ED
If Dapoxetine Is Unavailable
Clomipramine 12.5–50 mg, 3–4 hrs before sex
Preferred over paroxetine on-demand because it has better on-demand efficacy data and a shorter required lead time than paroxetine (3–4 hrs vs 3–6 hrs). Start at 12.5 mg to minimize side effects.
One-Line Answer
Dapoxetine 30 mg on-demand (1–3 hrs before sex) is the treatment of choice for on-demand PE management, with the best evidence, fastest action, and cleanest safety profile of all available options.
— Campbell-Walsh-Wein Urology, 11th ed., Table 71.3
How long the effect of depoxitein remain
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dapoxetine half life duration of action pharmacokinetics
Duration of Action of Dapoxetine
Pharmacokinetic Profile at a Glance
| Parameter | 30 mg | 60 mg |
|---|---|---|
| Time to peak (Tmax) | ~1.0 hr | ~1.3 hrs |
| Peak concentration (Cmax) | 297 ng/mL | 498 ng/mL |
| Initial half-life | ~1.3 hrs | ~1.4 hrs |
| Terminal half-life | ~18.7 hrs | ~21.9 hrs |
| Plasma level at 24 hrs | ~5% of peak | ~5% of peak |
What This Means Clinically
Active Effect Window
- Dapoxetine reaches peak plasma concentration in 1–1.3 hours — this is the window of maximum ejaculatory delay
- The clinical ejaculatory-delaying effect is generally considered to last approximately 4–6 hours around the peak
- After this, plasma levels drop rapidly — by 24 hours, only ~5% of peak concentration remains in the blood
Why It's Ideal for On-Demand Use
Dapoxetine has a biphasic elimination — it rises fast and falls fast:
- Fast absorption → works quickly (take 1–3 hrs before sex)
- Rapid early decline → effect clears within hours, no next-day accumulation
- Low residual levels → no build-up with repeated use, no withdrawal syndrome
This contrasts sharply with other SSRIs (paroxetine, sertraline) which have half-lives of 20–60+ hours and accumulate with daily use.
Practical Takeaway
Take dapoxetine 1–3 hours before sex. The main ejaculatory-delaying effect lasts approximately 4–6 hours. By 24 hours, it is largely cleared from the body.
- ✅ Can be taken with or without food (food does not significantly affect absorption)
- ✅ No accumulation with repeated on-demand use
- ✅ Safe to use maximum once every 24 hours
- ❌ Do not take more than once in 24 hours
Comparison with Other SSRIs (Why Dapoxetine Is Unique)
| Drug | Half-life | Use |
|---|---|---|
| Dapoxetine | ~1.4 hrs (initial) | On-demand ✅ |
| Paroxetine | ~21 hrs | Daily only |
| Sertraline | ~26 hrs | Daily only |
| Fluoxetine | 4–6 days | Daily only |
Dapoxetine's short initial half-life is what makes it the only SSRI pharmacokinetically suited for on-demand dosing.
— Smith & Tanagho's General Urology, 19th ed. | Campbell-Walsh-Wein Urology, 11th ed. | PubMed PMID: 16490806
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