IELT = intravaginal ejaculation latency time; IIEF-EFD = International Index of Erectile Function erectile function domain; PDE5 = phosphodiesterase type 5; PE = premature ejaculation. P < .05 between two groups at 2 years.
6. Are there any side effects?
For the cost of dapoxetine, patients in South Korea cannot be covered by national health insurance for the cost of treating sexual disorders such as ED and PE. Dapoxetine 30 and 60 mg are sold at approximately US$5.00 and US$10.00, respectively, which is similar to the price of PDE5 inhibitors. For the patient's disappointment, we suggest that physicians provide comprehensive counseling at the time of treatment commencement. Patients must understand that dapoxetine helps them to control ejaculation only temporarily and that PE is controllable and not curable. Careful counseling along these lines might improve treatment compliance.
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Although we fully explained the mechanism of action of dapoxetine at the start of treatment, it seems that we did not prevent patients' disappointments during treatment. Another interesting finding is that, although 79.1% of all patients discontinued treatment within 6 months, the discontinuation rate decreased sharply after 12 months. This is in agreement with the works of Mondaini et al4 and Jern et al,8 which were performed in real-world settings with follow-up times longer order priligy 60mg than 1 year. Jern et al8 reported that decisions to discontinue were usually made relatively soon after medication commenced; no patient discontinued medication after 30 months of usage. This emphasizes that, to improve compliance, it is essential that patients receive proper counseling, especially before starting treatment and/or in the early treatment period. Before the introduction of dapoxetine, off-label SSRIs, topical anesthetics, and the narcotic analgesic tramadol were the only medical agents used to treat PE. The discontinuation rates in patients with PE were very high.7, 8 Salonia et al7 found that up to 60% of patients who were prescribed paroxetine to treat lifelong PE eventually discontinued the drug. In addition, psychological and behavioral therapy and later the “squeeze” technique were associated with high discontinuation rates.9, 10 Although topical anesthetic agents were effective in the short term, no long-term data have been reported.11 Dapoxetine is suited for “on-demand” treatment of PE because the drug is rapidly absorbed and has a short initial half-life.12 The other SSRIs require daily dosing, increasing the risk of class treatment-emergent adverse events.
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| Priligy Generic Dapoxetine | 60mg | 120 + 10 Pills | 341.26€ 325.01€ | |
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Dapoxetine attains a peak plasma concentration approximately 1.5 hours after dosing compared with 6 hours for fluoxetine and 5 hours for paroxetine.13 Then, dapoxetine plasma levels decrease rapidly, to attain a concentration only 4% that of the peak 24 hours after dosing.14 Dapoxetine pharmacokinetics is not affected by multiple dosing; the drug does not accumulate to a significant extent.13 Several randomized controlled trials have reported on the efficacy and safety of dapoxetine in more than 6,000 patients with PE in more than 25 countries.15, 16, 17, 18 Integrated analysis of these phase 3 trials showed a significant increase in the geometric mean IELT.5 In addition, dapoxetine improved patient-reported outcome measurements compared with placebo.5 Dapoxetine also was effective in men with lifelong and acquired PE.5, 19, 20 Despite these favorable outcomes, treatment discontinuation rates are high. An integrated analysis of clinical dapoxetine trials showed that 30.4% of included subjects discontinued mostly because of a perceived lack of efficacy and for personal reasons.5 We summarize the dapoxetine discontinuation rates, and the reasons for discontinuation, in recently published articles (Table 3). Although the discontinuation rate varied by study type and duration, it ranged from 1.5% to 89.6%. In the Asia-Pacific Flexible Dose Study of Dapoxetine and Patient Satisfaction in Premature Ejaculation Therapy (PASSION) study by McMahon et al21 (a recent work in Asian-Pacific men with PE), more than 80% of subjects reported Clinical Global Impression of Change (CGIC) ratings of “slightly better” at 12 weeks. However, 23.5% of subjects discontinued the drug. The discontinuation rate in our study was higher than those noted in previous studies. We attribute this to differences in study design (study type and duration).
| Precaution | Details |
|---|---|
| Storage Temperature | Below 25°C (77°F) |
| Light and Moisture | Keep away from direct light and moisture |
| Child Safety | Store out of reach of children |
| Handling | Wash hands after handling; do not crush or chew |
| Disposal | Properly dispose of expired or unused medication |
In the phase 3 studies, patients were provided with the drug without cost, and the study durations did not exceed 12 weeks except in the work of Buvat et al16 (24 weeks; Table 3). Close monitoring, and the fact that the drug was free, might have enhanced compliance. In the real world, patients must pay for drugs and therefore would have high expectations of efficacy. Moreover, if the medication instructions provided by the pharmacist or the physician were inadequate, then inappropriate use was possible, decreasing drug efficacy. We suggest that these factors led to us recording a higher discontinuation rate than in phase 3 studies. Our finding is similar to those of two studies performed in real-world settings; they were of longer duration than the phase 3 trials.4, 8 Mondaini et al4 reported that 20% of patients with lifelong PE decided not to start dapoxetine treatment and almost 90% of those who initiated treatment discontinued within 1 year.
| Tip | Explanation |
|---|---|
| Take as prescribed | Do not exceed recommended dose |
| Avoid alcohol | Can worsen side effects |
| Report side effects | Especially severe headache or dizziness |
| Do not combine with other medications without consulting a doctor | To avoid interactions |
| Follow-up with doctor | For effectiveness and safety monitoring |
Jern et al8 evaluated dapoxetine and paroxetine discontinuation rates, and the prevalence of side effects, in a real-world setting and found that the dapoxetine discontinuation rate was 70.6%. Turning to the reasons for discontinuation, it was noteworthy that neither adverse events nor lack of efficacy were of major importance (Table 3), unlike what was noted in the phase 3 studies.9, 10, 11 Open-label observational studies (including ours) showed that high cost, disappointment in the need for continual treatment, and personal reasons were significant for discontinuation.4, 8 In the present study, cost was the most common reason for discontinuation, followed by disappointment that PE was not a curable disease and that dapoxetine was needed whenever sexual intercourse was contemplated. For the cost of dapoxetine, patients in South Korea cannot be covered by national health insurance for the cost of treating sexual disorders such as ED and PE. Dapoxetine 30 and 60 mg are sold at approximately US$5.00 and US$10.00, respectively, which is similar to the price of PDE5 inhibitors. For the patient's disappointment, we suggest that physicians provide comprehensive counseling at the time of treatment commencement. Patients must understand that dapoxetine helps them to control ejaculation only temporarily and that PE is controllable and not curable. Careful counseling along these lines might improve treatment compliance. Although we fully explained the mechanism of action of dapoxetine at the start of treatment, it seems that we did not prevent patients' disappointments during treatment. Another interesting finding is that, although 79.1% of all patients discontinued treatment within 6 months, the discontinuation rate decreased sharply after 12 months. This is in agreement with the works of Mondaini et al4 and Jern et al,8 which were performed in real-world settings with follow-up times longer order priligy 60mg than 1 year. Jern et al8 reported that decisions to discontinue were usually made relatively soon after medication commenced; no patient discontinued medication after 30 months of usage.
- Inform your doctor of all other medications to prevent interactions.
- The drug may cause changes in blood pressure.
- Monitoring by your healthcare provider ensures safe use.
- Follow storage instructions carefully to maintain medication stability.
This emphasizes that, to improve compliance, it is essential that patients receive proper counseling, especially before starting treatment and/or in the early treatment period.
- Possible side effects include headache, sweating, and diarrhea.
- Discuss your medical history with your doctor before use.
- Avoid using Priligy with certain antidepressants.
- The medication can improve control over ejaculation.
We found that patients with acquired PE (vs lifelong PE), with IELTs longer than 2 minutes before treatment, on PDE5 inhibitors, and with IIEF-EFD scores lower than 26 tended to exhibit high dropout rates at the end of the study. If patients with PE and ED on PDE5 inhibitors also took dapoxetine, the costs might have become too burdensome. Moreover, PDE5 inhibitors have been recently suggested to be useful treatments for PE.22 Thus, patients on PDE5 inhibitors might more readily stop dapoxetine treatment. However, unlike what we found, Jern et al8 reported that ED was more prevalent among those who continued dapoxetine treatment.
| Step | Instructions |
|---|---|
| Dosing Frequency | Once daily or as prescribed |
| Taking the Tablet | With water, with or without food |
| Timing | 1-3 hours before sexual activity |
| Missed Dose | Take as soon as remembered, do not double dose |
| Storage | Cool, dry place, keep out of reach of children |
Further study is needed on how concomitant PE and ED affect treatment of the other condition.
- Priligy 30 mg is typically taken on an as-needed basis.
- It is not intended for daily use without medical advice.
- The medication may cause slight drowsiness.
- Use caution when driving or operating machinery.
The high dropout rates of patients with acquired PE and baseline IELTs longer than 2 minutes might be attributable to the fact that their PE symptoms were not as severe as those of patients with lifelong PE and baseline IELTs shorter than 2 minutes; thus, it was easier for the former patients to stop their medication.
What is Premature Ejaculation
No second-line therapy is available for patients who do not respond to dapoxetine or who refuse to take the drug. Thus, we performed a comprehensive evaluation of factors triggering dropout in real-world practice. To the best of our knowledge, the present open-label observational study has the longest follow-up period (2 years) reported to date. The study design meant that several biases were in play, the first of which was recall bias. We retrospectively collected data on adverse events and the reasons for discontinuation using the telephone or mail.
How much to take
Second, we included only patients who agreed to commence dapoxetine in a single center; we could not evaluate patients who decided not to start dapoxetine when our study was initiated. Therefore, our study population differed from those of the dapoxetine phase 3 trials. Thus, selection and response biases might have been in play. However, we suggest that our study population was more similar to those encountered by physicians in real-world practice than the populations participating in phase 3 trials. Although we identified the reasons for dapoxetine discontinuation, we did not analyze the associations between IELT changes and discontinuation rates. Although the dapoxetine discontinuation rate was very high, no SSRI withdrawal syndromes were noted. The common side effects were yawning, nausea, dizziness, and headache. These effects were mild and well tolerated. To date, dapoxetine remains the only approved medical option for PE.
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We suggest that treatment outcomes can affect compliance and the discontinuation rate. However, our study was purely observational in nature; we did not check the post-treatment IELTs of patients who discontinued treatment. We assessed five parameters: type of PE, baseline IELT, age, use of PDE5 inhibitors, and erectile function. Further studies assessing more parameters in multivariate analysis would be valuable. In the present 2-year prospective observational study in a real-world setting, only 9.9% of patients continued treatment to 24 months; 79.1% discontinued within 6 months.
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Patients with acquired PE (vs lifelong PE), with IELTs longer than 2 minutes before treatment, on PDE5 inhibitors, and with IIEF-EFD scores lower than 26 tended to exhibit high dropout rates. The principal reasons for discontinuation were cost and disappointment with the need for continual treatment, followed by side effects and perceived poor efficacy. These results indicate that a more comprehensive treatment strategy is needed to manage patients with PE. (a)Conception and DesignHyun Jun Park; Nam Cheol Park (b)Acquisition of DataTae Nam Kim; Seung Ryong Baek; Kyung Min Lee; Sangmin Choe Tae Nam Kim; Seung Ryong Baek; Kyung Min Lee; Sangmin Choe (c)Analysis and Interpretation of DataHyun Jun Park; Sangmin Choe (a)Drafting the ArticleHyun Jun Park; Nam Cheol Park (b)Revising It for Intellectual ContentHyun Jun Park; Nam Cheol Park; Tae Nam Kim Hyun Jun Park; Nam Cheol Park; Tae Nam Kim (a)Final Approval of the Completed ArticleHyun Jun Park; Nam Cheol Park; Tae Nam Kim; Seung Ryong Baek; Kyung Min Lee; Sangmin Choe Hyun Jun Park; Nam Cheol Park; Tae Nam Kim; Seung Ryong Baek; Kyung Min Lee; Sangmin Choe Conflicts of Interest: The authors report no conflicts of interest. No second-line therapy is available for patients who do not respond to dapoxetine or who refuse to take the drug. Thus, we performed a comprehensive evaluation of factors triggering dropout in real-world practice. To the best of our knowledge, the present open-label observational study has the longest follow-up period (2 years) reported to date.
Where Can I Buy Dapoxetine in USA/UK
IELT = intravaginal ejaculation latency time; IIEF-EFD = International Index of Erectile Function erectile function domain; PDE5 = phosphodiesterase type 5; PE = premature ejaculation. P < .05 between two groups at 2 years. Before the introduction of dapoxetine, off-label SSRIs, topical anesthetics, and the narcotic analgesic tramadol were the only medical agents used to treat PE. The discontinuation rates in patients with PE were very high.7, 8 Salonia et al7 found that up to 60% of patients who were prescribed paroxetine to treat lifelong PE eventually discontinued the drug. In addition, psychological and behavioral therapy and later the “squeeze” technique were associated with high discontinuation rates.9, 10 Although topical anesthetic agents were effective in the short term, no long-term data have been reported.11 Dapoxetine is suited for “on-demand” treatment of PE because the drug is rapidly absorbed and has a short initial half-life.12 The other SSRIs require daily dosing, increasing the risk of class treatment-emergent adverse events.
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Dapoxetine attains a peak plasma concentration approximately 1.5 hours after dosing compared with 6 hours for fluoxetine and 5 hours for paroxetine.13 Then, dapoxetine plasma levels decrease rapidly, to attain a concentration only 4% that of the peak 24 hours after dosing.14 Dapoxetine pharmacokinetics is not affected by multiple dosing; the drug does not accumulate to a significant extent.13 Several randomized controlled trials have reported on the efficacy and safety of dapoxetine in more than 6,000 patients with PE in more than 25 countries.15, 16, 17, 18 Integrated analysis of these phase 3 trials showed a significant increase in the geometric mean IELT.5 In addition, dapoxetine improved patient-reported outcome measurements compared with placebo.5 Dapoxetine also was effective in men with lifelong and acquired PE.5, 19, 20 Despite these favorable outcomes, treatment discontinuation rates are high. An integrated analysis of clinical dapoxetine trials showed that 30.4% of included subjects discontinued mostly because of a perceived lack of efficacy and for personal reasons.5 We summarize the dapoxetine discontinuation rates, and the reasons for discontinuation, in recently published articles (Table 3). Although the discontinuation rate varied by study type and duration, it ranged from 1.5% to 89.6%. In the Asia-Pacific Flexible Dose Study of Dapoxetine and Patient Satisfaction in Premature Ejaculation Therapy (PASSION) study by McMahon et al21 (a recent work in Asian-Pacific men with PE), more than 80% of subjects reported Clinical Global Impression of Change (CGIC) ratings of “slightly better” at 12 weeks. However, 23.5% of subjects discontinued the drug. The study design meant that several biases were in play, the first of which was recall bias. We retrospectively collected data on adverse events and the reasons for discontinuation using the telephone or mail. Second, we included only patients who agreed to commence dapoxetine in a single center; we could not evaluate patients who decided not to start dapoxetine when our study was initiated. Therefore, our study population differed from those of the dapoxetine phase 3 trials. Thus, selection and response biases might have been in play.
Quick tips
We found that patients with acquired PE (vs lifelong PE), with IELTs longer than 2 minutes before treatment, on PDE5 inhibitors, and with IIEF-EFD scores lower than 26 tended to exhibit high dropout rates at the end of the study. If patients with PE and ED on PDE5 inhibitors also took dapoxetine, the costs might have become too burdensome. Moreover, PDE5 inhibitors have been recently suggested to be useful treatments for PE.22 Thus, patients on PDE5 inhibitors might more readily stop dapoxetine treatment. However, unlike what we found, Jern et al8 reported that ED was more prevalent among those who continued dapoxetine treatment. Further study is needed on how concomitant PE and ED affect treatment of the other condition.
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The high dropout rates of patients with acquired PE and baseline IELTs longer than 2 minutes might be attributable to the fact that their PE symptoms were not as severe as those of patients with lifelong PE and baseline IELTs shorter than 2 minutes; thus, it was easier for the former patients to stop their medication. Although the dapoxetine discontinuation rate was very high, no SSRI withdrawal syndromes were noted. The common side effects were yawning, nausea, dizziness, and headache. These effects were mild and well tolerated. To date, dapoxetine remains the only approved medical option for PE. However, we suggest that our study population was more similar to those encountered by physicians in real-world practice than the populations participating in phase 3 trials. Although we identified the reasons for dapoxetine discontinuation, we did not analyze the associations between IELT changes and discontinuation rates.
Product introduction
The discontinuation rate in our study was higher than those noted in previous studies. We attribute this to differences in study design (study type and duration). In the phase 3 studies, patients were provided with the drug without cost, and the study durations did not exceed 12 weeks except in the work of Buvat et al16 (24 weeks; Table 3). Close monitoring, and the fact that the drug was free, might have enhanced compliance. In the real world, patients must pay for drugs and therefore would have high expectations of efficacy.
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Moreover, if the medication instructions provided by the pharmacist or the physician were inadequate, then inappropriate use was possible, decreasing drug efficacy. We suggest that these factors led to us recording a higher discontinuation rate than in phase 3 studies. Our finding is similar to those of two studies performed in real-world settings; they were of longer duration than the phase 3 trials.4, 8 Mondaini et al4 reported that 20% of patients with lifelong PE decided not to start dapoxetine treatment and almost 90% of those who initiated treatment discontinued within 1 year. Jern et al8 evaluated dapoxetine and paroxetine discontinuation rates, and the prevalence of side effects, in a real-world setting and found that the dapoxetine discontinuation rate was 70.6%. Turning to the reasons for discontinuation, it was noteworthy that neither adverse events nor lack of efficacy were of major importance (Table 3), unlike what was noted in the phase 3 studies.9, 10, 11 Open-label observational studies (including ours) showed that high cost, disappointment in the need for continual treatment, and personal reasons were significant for discontinuation.4, 8 In the present study, cost was the most common reason for discontinuation, followed by disappointment that PE was not a curable disease and that dapoxetine was needed whenever sexual intercourse was contemplated. We suggest that treatment outcomes can affect compliance and the discontinuation rate. However, our study was purely observational in nature; we did not check the post-treatment IELTs of patients who discontinued treatment. We assessed five parameters: type of PE, baseline IELT, age, use of PDE5 inhibitors, and erectile function. Further studies assessing more parameters in multivariate analysis would be valuable. In the present 2-year prospective observational study in a real-world setting, only 9.9% of patients continued treatment to 24 months; 79.1% discontinued within 6 months. Patients with acquired PE (vs lifelong PE), with IELTs longer than 2 minutes before treatment, on PDE5 inhibitors, and with IIEF-EFD scores lower than 26 tended to exhibit high dropout rates.
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The principal reasons for discontinuation were cost and disappointment with the need for continual treatment, followed by side effects and perceived poor efficacy. These results indicate that a more comprehensive treatment strategy is needed to manage patients with PE. (a)Conception and DesignHyun Jun Park; Nam Cheol Park (b)Acquisition of DataTae Nam Kim; Seung Ryong Baek; Kyung Min Lee; Sangmin Choe Tae Nam Kim; Seung Ryong Baek; Kyung Min Lee; Sangmin Choe (c)Analysis and Interpretation of DataHyun Jun Park; Sangmin Choe (a)Drafting the ArticleHyun Jun Park; Nam Cheol Park (b)Revising It for Intellectual ContentHyun Jun Park; Nam Cheol Park; Tae Nam Kim Hyun Jun Park; Nam Cheol Park; Tae Nam Kim (a)Final Approval of the Completed ArticleHyun Jun Park; Nam Cheol Park; Tae Nam Kim; Seung Ryong Baek; Kyung Min Lee; Sangmin Choe Hyun Jun Park; Nam Cheol Park; Tae Nam Kim; Seung Ryong Baek; Kyung Min Lee; Sangmin Choe Conflicts of Interest: The authors report no conflicts of interest.