Organic solvent CH3OH: Phosphate (PO4) buffer pH 4.6 adjusted with ortho- phosphoric acid in the ratio of 85: 15 it was found the result of sharp peak was obtained for udenafil but, the result of dapoxetine HCl was hump shape peak obtained. After that the phosphate buffer was changed with tri-ethyl amine. Solvent Methanol 0.2% tri-ethyl amine in H2O pH adjusted to 4.5 with ortho-phosphoric acid in the ratio of 85: 15 was tested, the resulting sharp peak was observed for udenafil but slight tailing in peak was focused for HCl.
- Priligy should be used as part of a comprehensive treatment plan.
- Regular evaluation helps determine ongoing suitability.
- Do not alter the dose without professional guidance.
- Combined therapy may include counseling for best results.
In the Final of trails, CH3OH (Organic solvent of methanol) was changed to Acetonitrile (ACN) and the optimal mobile phase obtained was acetonitrile: 0.2% triethyl amine in water (H2O) at adjusted pH to 4.4 with ortho-phosphoric acid in the ratio 75: 25 V/V, with a flow rate 1.0 ml/min which provide an acceptable (tR) retention time), with high number of plates(N) and a better resolution (RS), more than another mobile phase tested before, for udenafil and dapoxetine HCl (Figure 3). The results of Linearity in the optimization method was designed by injection of a six values of concentrations of the drug adapted in the mobile phase in three times or triplicate into the liquid chromatography system by keeping the injection volume stable. The peak areas were hatch against in the corresponding of the mention concentrations to achieve a good calibration curve. Another term of precision is intermediate precision of the method which was analyse by repeating readings on three diverse days. Limits of Detection (LOD) and Quantification (LOQ) LOD and LOQ serve the concentration of the analyse API sample that would profit signal-to-noise(S/N) ratios of three for LOD and ten for LOQ, subsequently. To quantify the LOD and LOQ, consecutive dilutions of mixed prepared standard solution of udenafil and dapoxetine HCl was destined from the stock solution standard.
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The mention above solution stock was further diluted to get sample solution of 15 and 4 μg/ml for udenafil and dapoxetine HCl, correspondingly. 30 μl volume of solution sample was introduced by auto injection into HPLC, 6 times, with the same conditions described before. The areas of the peaks were measured at 246 nm and concentrations obtained in the samples were calculated using multilevel calibration curve indicating on the same HPLC system and in same time under the equivalent parameters and conditions using equation of linear regression. The development and validation for this method on estimation of udenafil and dapoxetine HCl simultaneously in priligy 30 mg price marketed solid dosage form/tablets in the present study the mobile phase involving acetonitrile: 0.2% triethyl amine in H2O pH was adjusted to 4.4 with ortho-phosphoric acid as buffer solution in ratio of (75: 25). The mean values of the slope and intercept were 143712 ± 0.847 and 147669 ± 1.211 for udenafil and 42734 ± 0.9641 and 432842 ± 0.5422 for dapoxetine HCl, respectively.
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The experiments of precision parameters as repeatability and intermediate precision the results are shown in Table 1. Table 1: The results for repeatability and intermediate precision parameters The validated method was found to be precise as the Relative Standard Deviation (RSD) values for the parameters of repeatability and intermediate precision studies were < 2%, correspondingly according to the ICH-guidelines. The term N/S ratios (signal-to-noise) of 6:2 and 20:2 were pick up for the measure of parameters LOD and LOQ respectively. Any parameters selected (except columns from diverse suppliers) was modified at three levels according to ICH-guidelines (−1, 0 and 1). One parameter at the time was changed to evaluate the development. The samples were injected in liquid chromatography system and deliberated signal from the samples was correlated with those of blank samples. To checkout one of the important parameters in validation according to ICH – guidelines, robustness of a HPLC method, petty parameter was purposely various. The parameters constituted changes of flow rate, percentage of the organic solvent (ACN) acetonitrile in the mobile phase and the other solvents from diverse part were appropriated. The specificity of the assay against the drug formula was entrenched over the study of resolution factor (Rs) of the drug peak and peak width from the adjacent resolved peak. The peak purity of udenafil and dapoxetine HCl, was steadfast by analysed the spectrum at three diverse regions of the blot i.e., Start peak (S), apex peak (A) and last peak (Peak end E) (L). Reaction and effect of excipients of the drug formulation was planned for whether it can be interfering with the assay of method.
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Accuracy of this method was achieved by employ the method to drug analysed sample (Udenafil and Dapoxetine HCL consolidation tablet) to which known amount of Udenafil and Dapoxetine HCL standard powder reciprocal to 80, 100 and 120% (According to ICH-guidelines) of label claim had been added (Standard Addition Method -SAM), mixed and the powder was obtained and verified by running read out chromatogram in developed mobile phase. Analysis and determination of a commercials formulation To determine exactly the contended of udenafil and dapoxetine HCl in current and common tablet in Jordanian market (trade name: Zydena200 mg/tablet, requirement label: 200 mg udenafil and 60 mg/tablet dapoxetine HCl), 20 tablets were weighed for this test, their mean substances were determined and powdered. The weight of the tablet grind equivalent to 200 mg of udenafil and 60 mg dapoxetine HCl was removed into a 100 mL volumetric flask containing 45-50 ml CH3OH (Methanol, sonicated for 25 min and diluted up to 50 mL with CH3OH. The obtaining solution was centrifuged at (4000 rpm) time of 7 min and the API-content of the supernatant was decisive (250 and 1400 μg/ml for udenafil and dapoxetine HCl, correspondingly).
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The method operation has been assessing in terms of the followings parameters which include linearity, accuracy, precision and robustness in order to confirm the suitability of this analytical method obtained. This validated method was also adjusted to the commercials and marketed samples. The author would like to thank Faculty of Pharmacy and Medical Sciences-University of Petra; Jordan, Faculty of Medicine-Department of Gynecology and Obstetrics-University of Saarland, Germany and Faculty of Pharmacy and Medical Sciences-Al-Ahliyya Amman University- Jordan; for the facilities to finalize this project. ICH, Guidance for Industry Q2B Validation of Analytical Procedures: Methodology, 1996, 1-12, (Incorporated in November, 2005). ICH Harmonized Tripartite Guideline: Validation of analytical procedures: Text and methodology Q2 (R1), 1996, 1-17, (Incorporated in November, 2005).
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Premature ejaculation is a common ejaculation problem. This is when the male ejaculates sooner than he or his partner wishes during sexual arousal and activity. This can happen occasionally and is not a cause for concern! However, if it happens more than you'd like and is a problem, it might help to get treatment. Various psychological and physical factors can cause a man to suddenly experience premature ejaculation. Supernatant was appropriated and then a suitable dilution for the sample solution after filtered using 0.50- micron filter type (Millipore-Milford). The mention above solution stock was further diluted to get sample solution of 15 and 4 μg/ml for udenafil and dapoxetine HCl, correspondingly. 30 μl volume of solution sample was introduced by auto injection into HPLC, 6 times, with the same conditions described before. The areas of the peaks were measured at 246 nm and concentrations obtained in the samples were calculated using multilevel calibration curve indicating on the same HPLC system and in same time under the equivalent parameters and conditions using equation of linear regression. The development and validation for this method on estimation of udenafil and dapoxetine HCl simultaneously in priligy 30 mg price marketed solid dosage form/tablets in the present study the mobile phase involving acetonitrile: 0.2% triethyl amine in H2O pH was adjusted to 4.4 with ortho-phosphoric acid as buffer solution in ratio of (75: 25). The mean values of the slope and intercept were 143712 ± 0.847 and 147669 ± 1.211 for udenafil and 42734 ± 0.9641 and 432842 ± 0.5422 for dapoxetine HCl, respectively.
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To checkout one of the important parameters in validation according to ICH – guidelines, robustness of a HPLC method, petty parameter was purposely various. The parameters constituted changes of flow rate, percentage of the organic solvent (ACN) acetonitrile in the mobile phase and the other solvents from diverse part were appropriated. The specificity of the assay against the drug formula was entrenched over the study of resolution factor (Rs) of the drug peak and peak width from the adjacent resolved peak. The peak purity of udenafil and dapoxetine HCl, was steadfast by analysed the spectrum at three diverse regions of the blot i.e., Start peak (S), apex peak (A) and last peak (Peak end E) (L). Reaction and effect of excipients of the drug formulation was planned for whether it can be interfering with the assay of method.
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Accuracy of this method was achieved by employ the method to drug analysed sample (Udenafil and Dapoxetine HCL consolidation tablet) to which known amount of Udenafil and Dapoxetine HCL standard powder reciprocal to 80, 100 and 120% (According to ICH-guidelines) of label claim had been added (Standard Addition Method -SAM), mixed and the powder was obtained and verified by running read out chromatogram in developed mobile phase. Analysis and determination of a commercials formulation To determine exactly the contended of udenafil and dapoxetine HCl in current and common tablet in Jordanian market (trade name: Zydena200 mg/tablet, requirement label: 200 mg udenafil and 60 mg/tablet dapoxetine HCl), 20 tablets were weighed for this test, their mean substances were determined and powdered. The weight of the tablet grind equivalent to 200 mg of udenafil and 60 mg dapoxetine HCl was removed into a 100 mL volumetric flask containing 45-50 ml CH3OH (Methanol, sonicated for 25 min and diluted up to 50 mL with CH3OH. The obtaining solution was centrifuged at (4000 rpm) time of 7 min and the API-content of the supernatant was decisive (250 and 1400 μg/ml for udenafil and dapoxetine HCl, correspondingly). Supernatant was appropriated and then a suitable dilution for the sample solution after filtered using 0.50- micron filter type (Millipore-Milford). The experiments of precision parameters as repeatability and intermediate precision the results are shown in Table 1. Table 1: The results for repeatability and intermediate precision parameters The validated method was found to be precise as the Relative Standard Deviation (RSD) values for the parameters of repeatability and intermediate precision studies were < 2%, correspondingly according to the ICH-guidelines. The term N/S ratios (signal-to-noise) of 6:2 and 20:2 were pick up for the measure of parameters LOD and LOQ respectively. Any parameters selected (except columns from diverse suppliers) was modified at three levels according to ICH-guidelines (−1, 0 and 1). One parameter at the time was changed to evaluate the development. Hence, repeat injections at 6 trails (n=6) of mixed of standard solution at three known concentration ranges were performed under small deliberate modified of three chromatographic factors or parameters.
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thyroid problems – an overactive thyroid or an underactive thyroid anxiety about sexual performance (particularly at the start of a new relationship or when a man has had previous problems with sexual performance) Priligy contains an active substance called dapoxetine.
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These deliberated changes show an insignificant variation in the areas of the peak (PA) and fewer changeability in retention time (tr) were detected and observed, as mention above three factors were slightly changed at three levels too which (-1.0, 0.0,1.0) (Table 2a, 2b, 2c and 2d). Table 2a: Robustness parameters testing (n=3) for udenafil (Zydena®) tablet Table 2b: Robustness parameters testing (n=3) for dapoxetine HCl (Priligy®) tablet Table 2c: Robustness parameters testing (n=3) for udenafil (Zydena®) tablet Table 2d: Robustness parameters testing (n=3) for dapoxetine HCl (Priligy®) tablet According to ICH-guidelines requirements, peak purity requirements of udenafil and dapoxetine HCl was determined by correlating their corresponding spectra at the peak start(S), apex(A) and peak end(last)(E) positions i.e., r (S, A)=0.9986 and r (M, E)=0.9990.
- Do not use Priligy if you are allergic to dapoxetine.
- Combining Priligy with other serotonergic drugs can be risky.
- Report any unusual mood changes or thoughts of self-harm.
- Priligy is not a cure but a symptom management medication.
Good correlation (R=0.9988) was achieved between the standard sample and targeted sample spectra of udenafil and dapoxetine HCl, correspondingly. Also, the none active ingredient called excipients from the pharmaceutical formulation were not intrusive or interacting with the assay components. As seen in the data obtained in Table 3a and 3b, there are a good recoveries parameters obtained of the udenafil collected date and dapoxetine HCl date in the range from 98.92 to 102.42% were realized at different combined concentrations. Table 3a: Recovery parameters studies for udenafil at n=6 Table 3b: Recovery parameters studies for dapoxetine HCL at n=6 The results obtained in this experiment of the quantity of udenafil and dapoxetine HCl in marketed tablets, expressed as a percentage of label request or claims were in acceptable agreement with the label request or claims by that implying that there are no interactions from any of additives or excipients which are ordinary present.
| Medication Class | Effect on Priligy | Notes |
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| SSRIs | Increased risk of side effects | Use with caution, consult physician |
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Two several lots of udenafil and dapoxetine HCl in tablets were testing using the scheduled procedures as seen in Table 4a and 4b. Table 4a: The assay of marketed tablets formulation of udenafil Table 4b: The assay of marketed tablets formulation of dapoxetine HCl The HPLC method was easy developed and validated according to ICH-guidelines. By using UV-detection grant an accurate and precise determination of udenafil 200 mg in marketed formula (Zydena®) and dapoxetine HCl also in marketed formula (Priligy®). The method operation has been assessing in terms of the followings parameters which include linearity, accuracy, precision and robustness in order to confirm the suitability of this analytical method obtained. This validated method was also adjusted to the commercials and marketed samples.
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Hence, repeat injections at 6 trails (n=6) of mixed of standard solution at three known concentration ranges were performed under small deliberate modified of three chromatographic factors or parameters. These deliberated changes show an insignificant variation in the areas of the peak (PA) and fewer changeability in retention time (tr) were detected and observed, as mention above three factors were slightly changed at three levels too which (-1.0, 0.0,1.0) (Table 2a, 2b, 2c and 2d). Table 2a: Robustness parameters testing (n=3) for udenafil (Zydena®) tablet Table 2b: Robustness parameters testing (n=3) for dapoxetine HCl (Priligy®) tablet Table 2c: Robustness parameters testing (n=3) for udenafil (Zydena®) tablet Table 2d: Robustness parameters testing (n=3) for dapoxetine HCl (Priligy®) tablet According to ICH-guidelines requirements, peak purity requirements of udenafil and dapoxetine HCl was determined by correlating their corresponding spectra at the peak start(S), apex(A) and peak end(last)(E) positions i.e., r (S, A)=0.9986 and r (M, E)=0.9990. Good correlation (R=0.9988) was achieved between the standard sample and targeted sample spectra of udenafil and dapoxetine HCl, correspondingly. Also, the none active ingredient called excipients from the pharmaceutical formulation were not intrusive or interacting with the assay components.
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As seen in the data obtained in Table 3a and 3b, there are a good recoveries parameters obtained of the udenafil collected date and dapoxetine HCl date in the range from 98.92 to 102.42% were realized at different combined concentrations. Table 3a: Recovery parameters studies for udenafil at n=6 Table 3b: Recovery parameters studies for dapoxetine HCL at n=6 The results obtained in this experiment of the quantity of udenafil and dapoxetine HCl in marketed tablets, expressed as a percentage of label request or claims were in acceptable agreement with the label request or claims by that implying that there are no interactions from any of additives or excipients which are ordinary present. Two several lots of udenafil and dapoxetine HCl in tablets were testing using the scheduled procedures as seen in Table 4a and 4b. Table 4a: The assay of marketed tablets formulation of udenafil Table 4b: The assay of marketed tablets formulation of dapoxetine HCl The HPLC method was easy developed and validated according to ICH-guidelines. By using UV-detection grant an accurate and precise determination of udenafil 200 mg in marketed formula (Zydena®) and dapoxetine HCl also in marketed formula (Priligy®). The author would like to thank Faculty of Pharmacy and Medical Sciences-University of Petra; Jordan, Faculty of Medicine-Department of Gynecology and Obstetrics-University of Saarland, Germany and Faculty of Pharmacy and Medical Sciences-Al-Ahliyya Amman University- Jordan; for the facilities to finalize this project. ICH, Guidance for Industry Q2B Validation of Analytical Procedures: Methodology, 1996, 1-12, (Incorporated in November, 2005).
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Organic solvent CH3OH: Phosphate (PO4) buffer pH 4.6 adjusted with ortho- phosphoric acid in the ratio of 85: 15 it was found the result of sharp peak was obtained for udenafil but, the result of dapoxetine HCl was hump shape peak obtained. After that the phosphate buffer was changed with tri-ethyl amine. Solvent Methanol 0.2% tri-ethyl amine in H2O pH adjusted to 4.5 with ortho-phosphoric acid in the ratio of 85: 15 was tested, the resulting sharp peak was observed for udenafil but slight tailing in peak was focused for HCl. In the Final of trails, CH3OH (Organic solvent of methanol) was changed to Acetonitrile (ACN) and the optimal mobile phase obtained was acetonitrile: 0.2% triethyl amine in water (H2O) at adjusted pH to 4.4 with ortho-phosphoric acid in the ratio 75: 25 V/V, with a flow rate 1.0 ml/min which provide an acceptable (tR) retention time), with high number of plates(N) and a better resolution (RS), more than another mobile phase tested before, for udenafil and dapoxetine HCl (Figure 3). The results of Linearity in the optimization method was designed by injection of a six values of concentrations of the drug adapted in the mobile phase in three times or triplicate into the liquid chromatography system by keeping the injection volume stable.
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The peak areas were hatch against in the corresponding of the mention concentrations to achieve a good calibration curve. Another term of precision is intermediate precision of the method which was analyse by repeating readings on three diverse days. Limits of Detection (LOD) and Quantification (LOQ) LOD and LOQ serve the concentration of the analyse API sample that would profit signal-to-noise(S/N) ratios of three for LOD and ten for LOQ, subsequently. To quantify the LOD and LOQ, consecutive dilutions of mixed prepared standard solution of udenafil and dapoxetine HCl was destined from the stock solution standard. The samples were injected in liquid chromatography system and deliberated signal from the samples was correlated with those of blank samples. ICH Harmonized Tripartite Guideline: Validation of analytical procedures: Text and methodology Q2 (R1), 1996, 1-17, (Incorporated in November, 2005).
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Premature ejaculation is a common ejaculation problem. This is when the male ejaculates sooner than he or his partner wishes during sexual arousal and activity. This can happen occasionally and is not a cause for concern! However, if it happens more than you'd like and is a problem, it might help to get treatment. Various psychological and physical factors can cause a man to suddenly experience premature ejaculation.
| 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 |
thyroid problems – an overactive thyroid or an underactive thyroid anxiety about sexual performance (particularly at the start of a new relationship or when a man has had previous problems with sexual performance) Priligy contains an active substance called dapoxetine.
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