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5.10 Concomitant Use of Potent Inhibitors of Cytochrome P450 3A4 (CYP3A4)
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17.4 Concomitant Use with Drugs Which Lower Blood Pressure
7.2 Alpha-blockers
17.9 Alcohol

In a 12-month dog study, no disseminated arteritis was observed, but 2 dogs exhibited marked decreases in white blood cells (neutrophils) and moderate decreases in platelets with inflammatory signs at unbound tadalafil exposures of approximately 14- to 18-fold the human exposure at the MRHD of 20 mg. The abnormal blood-cell findings were reversible within 2 weeks after stopping treatment. Carcinogenesis - Tadalafil was not carcinogenic to rats or mice when administered daily for 2 years at doses up to 400 mg/kg/day. Systemic drug exposures, as measured by AUC of unbound tadalafil, were approximately 10-fold for mice, and 14- and 26-fold for male and female rats, respectively, the exposures in human males given Maximum Recommended Human Dose (MRHD) of 20 mg. Mutagenesis - Tadalafil was not mutagenic in the in vitro bacterial Ames assays or the forward mutation test in mouse lymphoma cells.

5.10 Concomitant Use of Potent Inhibitors of Cytochrome P450 3A4 (CYP3A4)

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What should I know about tadalafil before using it?

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Systemic exposure (based on AUC) at no-observed-adverse-effect-level (NOAEL) (10 mg/kg/day) for unbound tadalafil was similar to that expected in humans at the MRHD of 20 mg. There were no treatment-related testicular findings in rats or mice treated with doses up to 400 mg/kg/day for 2 years. Animal studies showed vascular inflammation in tadalafil-treated mice, rats, and dogs. 14 CLINICAL STUDIES 14.1 Tadalafil Tablets for Use as Needed for EDThe efficacy and safety of tadalafil in the treatment of erectile dysfunction has been evaluated in 22 clinical trials of up to 24-weeks duration, involving over 4000 patients.

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Patients with diabetes were included in all 7 primary efficacy studies in the general ED population (N=235) and in one study that specifically assessed tadalafil tablets in ED patients with type 1 or type 2 diabetes (N=216). In this randomized, placebo-controlled, double-blinded, parallel-arm design prospective trial, tadalafil tablets demonstrated clinically meaningful and statistically significant improvement in erectile function, as measured by the EF domain of the IIEF questionnaire and Questions 2 and 3 of the SEP diary (see Table 15).Table 15: Mean Endpoint and Change from Baseline for the Primary Efficacy Variables in a Study in ED Patients with DiabetesEfficacy Results in ED Patients following Radical Prostatectomy - Tadalafil tablets were shown to be effective in treating patients who developed ED following bilateral nerve-sparing radical prostatectomy. In 1 randomized, placebo-controlled, double-blinded, parallel-arm design prospective trial in this population (N=303), tadalafil tablets demonstrated clinically meaningful and statistically significant improvement in erectile function, as measured by the EF domain of the IIEF questionnaire and Questions 2 and 3 of the SEP diary (see Table 16).Table 16: Mean Endpoint and Change from Baseline for the Primary Efficacy Variables in a Study in Patients who Developed ED Following Bilateral Nerve-Sparing Radical ProstatectomyResults in Studies to Determine the Optimal Use of Tadalafil Tablets- Several studies were conducted with the objective of determining the optimal use of tadalafil tablets in the treatment of ED. In one of these studies, the percentage of patients reporting successful erections within 30 minutes of dosing was determined. In this randomized, placebo-controlled, double-blinded trial, 223 patients were randomized to placebo, tadalafil tablets 10 mg, or 20 mg.

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Using a stopwatch, patients recorded the time following dosing at which a successful erection was obtained. A successful erection was defined as at least 1 erection in 4 attempts that led to successful intercourse. At or prior to 30 minutes, 35% (26/74), 38% (28/74), and 52% (39/75) of patients in the placebo, 10-mg, and 20-mg groups, respectively, reported successful erections as defined above.Two studies were conducted to assess the efficacy of tadalafil tablets at a given time point after dosing, specifically at 24 hours and at 36 hours after dosing.In the first of these studies, 348 patients with ED were randomized to placebo or tadalafil tablets 20 mg. Patients were encouraged to make 4 total attempts at intercourse; 2 attempts were to occur at 24 hours after dosing and 2 completely separate attempts were to occur at 36 hours after dosing. The results demonstrated a difference between the placebo group and the tadalafil tablets group at each of the pre-specified time points.

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Tadalafil tablets, when taken as needed up to once per day, was shown to be effective in improving erectile function in men with erectile dysfunction (ED).Tadalafil tablets were studied in the general ED population in 7 randomized, multicenter, double-blinded, placebo-controlled, parallel-arm design, primary efficacy and safety studies of 12-weeks duration. Two of these studies were conducted in the United States and 5 were conducted in centers outside the US. Additional efficacy and safety studies were performed in ED patients with diabetes mellitus and in patients who developed ED status post bilateral nerve-sparing radical prostatectomy.In these 7 trials, tadalafil tablets were taken as needed, at doses ranging from 2.5 mg to 20 mg, up to once per day. Patients were free to choose the time interval between dose administration and the time of sexual attempts. Food and alcohol intake were not restricted.Several assessment tools were used to evaluate the effect of tadalafil tablets on erectile function.

Color Shade	Approximate Dose	Additional Features	Notes
Bright Yellow	100 mg	High concentration	Prescription-only
Pale Yellow	25 mg	Lower dose	Suitable for sensitive users
Deep Amber	50 mg	Standard dose	Most common

The 3 primary outcome measures were the Erectile Function (EF) domain of the International Index of Erectile Function (IIEF) and Questions 2 and 3 from Sexual Encounter Profile (SEP). The IIEF is a 4-week recall questionnaire that was administered at the end of a treatment-free baseline period and subsequently at follow-up visits after randomization. The IIEF EF domain has a 30-point total score, where higher scores reflect better erectile function. SEP is a diary in which patients recorded each sexual attempt made throughout the study. SEP Question 2 asks, “Were you able to insert your penis into the partner’s vagina?” SEP Question 3 asks, “Did your erection last long enough for you to have successful intercourse?” The overall percentage of successful attempts to insert the penis into the vagina (SEP2) and to maintain the erection for successful intercourse (SEP3) is derived for each patient.Results in ED Population in US Trials - The 2 primary US efficacy and safety trials included a total of 402 men with erectile dysfunction, with a mean age of 59 years (range 27 to 87 years). The population was 78% White, 14% Black, 7% Hispanic, and 1% of other ethnicities, and included patients with ED of various severities, etiologies (organic, psychogenic, mixed), and with multiple co-morbid conditions, including diabetes mellitus, hypertension, and other cardiovascular disease. Most (>90%) patients reported ED of at least 1-year duration. Study A was conducted primarily in academic centers.

17.4 Concomitant Use with Drugs Which Lower Blood Pressure

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The population was 78% White, 14% Black, 7% Hispanic, and 1% of other ethnicities, and included patients with ED of various severities, etiologies (organic, psychogenic, mixed), and with multiple co-morbid conditions, including diabetes mellitus, hypertension, and other cardiovascular disease. Most (>90%) patients reported ED of at least 1-year duration. Study A was conducted primarily in academic centers. Study B was conducted primarily in community-based urology practices. In each of these 2 trials, tadalafil tablets 20 mg showed clinically meaningful and statistically cheap viagra online significant improvements in all 3 primary efficacy variables (see Table 11).

How does tadalafil work (mechanism of action)?

The treatment effect of tadalafil tablets did not diminish over time.Table 11: Mean Endpoint and Change from Baseline for the Primary Efficacy Variables in the Two Primary US TrialsResults in General ED Population in Trials Outside the US - The 5 primary efficacy and safety studies conducted in the general ED population outside the US included 1112 patients, with a mean age of 59 years (range 21 to 82 years). The population was 76% White, 1% Black, 3% Hispanic, and 20% of other ethnicities, and included patients with ED of various severities, etiologies (organic, psychogenic, mixed), and with multiple co-morbid conditions, including diabetes mellitus, hypertension, and other cardiovascular disease. Most (90%) patients reported ED of at least 1-year duration. In these 5 trials, tadalafil tablets 5 mg, 10 mg, and 20 mg showed clinically meaningful and statistically significant improvements in all 3 primary efficacy variables (see Tables 12, 13 and 14). The treatment effect of tadalafil tablets did not diminish over time.Table 12: Mean Endpoint and Change from Baseline for the EF Domain of the IIEF in the General ED Population in Five Primary Trials Outside the USaTreatment duration in Study F was 6 monthsTable 13: Mean Post-Baseline Success Rate and Change from Baseline for SEP Question 2 (“Were you able to insert your penis into the partner’s vagina?”) in the General ED Population in Five Pivotal Trials Outside the USaTreatment duration in Study F was 6 monthsTable 14: Mean Post-Baseline Success Rate and Change from Baseline for SEP Question 3 (“Did your erection last long enough for you to have successful intercourse?”) in the General ED Population in Five Pivotal Trials Outside the USaTreatment duration in Study F was 6 monthsIn addition, there were improvements in EF domain scores, success rates based upon SEP Questions 2 and 3, and patient-reported improvement in erections across patients with ED of all degrees of disease severity while taking tadalafil tablets, compared to patients on placebo.Therefore, in all 7 primary efficacy and safety studies, tadalafil tablets showed statistically significant improvement in patients’ ability to achieve an erection sufficient for vaginal penetration and to maintain the erection long enough for successful intercourse, as measured by the IIEF questionnaire and by SEP diaries.Efficacy Results in ED Patients with Diabetes Mellitus - Tadalafil tablets were shown to be effective in treating ED in patients with diabetes mellitus. Study B was conducted primarily in community-based urology practices. In each of these 2 trials, tadalafil tablets 20 mg showed clinically meaningful and statistically cheap viagra online significant improvements in all 3 primary efficacy variables (see Table 11).

7.2 Alpha-blockers

There are various brands producing yellow Viagra pills, with slight ingredient variations.
The pill can sometimes be identified by its specific shape and markings.
Regular monitoring by a healthcare provider is recommended during treatment.
Viagra's molecular structure is designed to target specific enzymes related to erections.
Consumers should beware of unverified sources selling cheap or suspicious yellow pills.
Proper use and adherence to prescribed doses maximize safety and effectiveness.

The treatment effect of tadalafil tablets did not diminish over time.Table 12: Mean Endpoint and Change from Baseline for the EF Domain of the IIEF in the General ED Population in Five Primary Trials Outside the USaTreatment duration in Study F was 6 monthsTable 13: Mean Post-Baseline Success Rate and Change from Baseline for SEP Question 2 (“Were you able to insert your penis into the partner’s vagina?”) in the General ED Population in Five Pivotal Trials Outside the USaTreatment duration in Study F was 6 monthsTable 14: Mean Post-Baseline Success Rate and Change from Baseline for SEP Question 3 (“Did your erection last long enough for you to have successful intercourse?”) in the General ED Population in Five Pivotal Trials Outside the USaTreatment duration in Study F was 6 monthsIn addition, there were improvements in EF domain scores, success rates based upon SEP Questions 2 and 3, and patient-reported improvement in erections across patients with ED of all degrees of disease severity while taking tadalafil tablets, compared to patients on placebo.Therefore, in all 7 primary efficacy and safety studies, tadalafil tablets showed statistically significant improvement in patients’ ability to achieve an erection sufficient for vaginal penetration and to maintain the erection long enough for successful intercourse, as measured by the IIEF questionnaire and by SEP diaries.Efficacy Results in ED Patients with Diabetes Mellitus - Tadalafil tablets were shown to be effective in treating ED in patients with diabetes mellitus. Patients with diabetes were included in all 7 primary efficacy studies in the general ED population (N=235) and in one study that specifically assessed tadalafil tablets in ED patients with type 1 or type 2 diabetes (N=216). In this randomized, placebo-controlled, double-blinded, parallel-arm design prospective trial, tadalafil tablets demonstrated clinically meaningful and statistically significant improvement in erectile function, as measured by the EF domain of the IIEF questionnaire and Questions 2 and 3 of the SEP diary (see Table 15).Table 15: Mean Endpoint and Change from Baseline for the Primary Efficacy Variables in a Study in ED Patients with DiabetesEfficacy Results in ED Patients following Radical Prostatectomy - Tadalafil tablets were shown to be effective in treating patients who developed ED following bilateral nerve-sparing radical prostatectomy. In 1 randomized, placebo-controlled, double-blinded, parallel-arm design prospective trial in this population (N=303), tadalafil tablets demonstrated clinically meaningful and statistically significant improvement in erectile function, as measured by the EF domain of the IIEF questionnaire and Questions 2 and 3 of the SEP diary (see Table 16).Table 16: Mean Endpoint and Change from Baseline for the Primary Efficacy Variables in a Study in Patients who Developed ED Following Bilateral Nerve-Sparing Radical ProstatectomyResults in Studies to Determine the Optimal Use of Tadalafil Tablets- Several studies were conducted with the objective of determining the optimal use of tadalafil tablets in the treatment of ED. In one of these studies, the percentage of patients reporting successful erections within 30 minutes of dosing was determined.

The yellow Viagra pill may have a logo, company name, or unique markings.
It is part of a class of drugs called phosphodiesterase inhibitors.
Side effects vary but can include dizziness, upset stomach, or visual disturbances.
Do not use if you have severe liver or kidney problems without medical advice.
Always discuss current health and medications with your healthcare provider before use.
The pill should be used strictly as part of a prescribed treatment plan.

In this randomized, placebo-controlled, double-blinded trial, 223 patients were randomized to placebo, tadalafil tablets 10 mg, or 20 mg.

The color yellow helps distinguish Viagra pills from other ED medications.
Some yellow Viagra tablets are designed for extended-release effects.
It's essential to purchase from reliable sources to avoid counterfeit pills.
Viagra works by inhibiting an enzyme called PDE5, enhancing blood flow.
Missing doses or inconsistent use can reduce treatment effectiveness.
Always read the patient information leaflet included with the pill.

17.9 Alcohol

How should I store tadalafil?

Impairment of Fertility - There were no effects on fertility, reproductive performance or reproductive organ morphology in male or female rats given oral doses of tadalafil up to 400 mg/kg/day, a dose producing AUCs for unbound tadalafil of 14-fold for males or 26-fold for females the exposures observed in human males given the MRHD of 20 mg. Systemic exposure (based on AUC) at no-observed-adverse-effect-level (NOAEL) (10 mg/kg/day) for unbound tadalafil was similar to that expected in humans at the MRHD of 20 mg. There were no treatment-related testicular findings in rats or mice treated with doses up to 400 mg/kg/day for 2 years. Animal studies showed vascular inflammation in tadalafil-treated mice, rats, and dogs. 14 CLINICAL STUDIES 14.1 Tadalafil Tablets for Use as Needed for EDThe efficacy and safety of tadalafil in the treatment of erectile dysfunction has been evaluated in 22 clinical trials of up to 24-weeks duration, involving over 4000 patients.