Evaluation of the Efficacy and Safety of Once-a-Day Dosing of Tadalafil 5mg and 10mg in the Treatment of Erectile Dysfunction: Results of a Multicenter, Randomized, Double-Blind, Placebo-Controlled Trial
It's not possible to determine if these events are related directly to the ED tablets or to other factors.
- Tadalafil Cialis daily serves as an effective long-term treatment for ED.
- It allows for more natural sexual spontaneity.
- The medication can be taken with water at the same time daily.
- Expect gradual improvement with consistent use.
- Be aware of potential side effects like flushing or nasal congestion.
- It’s essential to maintain a healthy lifestyle alongside treatment.
- Discontinue medication and seek advice for severe reactions.
- Be cautious with activities that require alertness post-dose.
- Use only the prescribed dosage to avoid health risks.
- Men over 65 should consult their doctor regarding safety.
- Daily tadalafil can be part of a broader sexual health plan.
- Keep open communication with your healthcare provider regarding progress.
If you have a sudden decrease or loss of vision or hearing, stop taking any ED tablet, including Cialis and call a healthcare provider right away. protect a man or his partner from sexually transmitted diseases, including HIV serve as a male form of birth control For additional information, talk to your doctor and see full Patient Information at and Prescribing Information at or visit for more information. * The brand listed is a trademark of its respective owner and is not a trademark of Eli Lilly and Company. The maker of this brand is not affiliated with and does not endorse Eli Lilly and Company or its products. Lilly, a leading innovation-driven corporation, is developing a growing portfolio of pharmaceutical products by applying the latest research from its own worldwide laboratories and from collaborations with eminent scientific organizations. Headquartered in Indianapolis, Ind., Lilly provides answers – through medicines and information – for some of the world's most urgent medical needs. Additional information about Lilly is available at This press release contains forward-looking statements about the use of Cialis for the treatment of erectile dysfunction reflects Lilly's current beliefs. However, as with any pharmaceutical product under development, there are substantial risks and uncertainties in the process of development, commercialization, and regulatory review. There is no guarantee that the product will receive additional regulatory approvals. There is also no guarantee that the product will continue to be commercially successful.
Cialis Stops Working Well Maybe a Sign of Worsening Vascular Disease
The treatment satisfaction score determined by SLQQ (mean ± standard deviation) was 62.4 ± 21.0 at month 12 versus 65.9 ± 20.2 at month 24. Two-year daily application of tadalafil 5 mg in Chinese men with ED showed a favorable safety profile and durable improvement in sexual performance and satisfaction. Erectile dysfunction (ED) refers to the failure of achieving or maintaining satisfying function during sexual activities due to endocrine, psychological, or cardiovascular anomalies. Approximately 20%–41% of men report ED worldwide.1–3 The incidence of ED is 14.2% in young adults (18–31 years), among whom moderate-to-severe ED accounts for 2.9%.4 In China, the incidence of ED among men aged >40 years is 40.6% and increases with age (from 18.1% in men aged 40–49 years to 81.6% in men aged ≥70 years).5 Although ED is not life-threatening, it is independently associated with reduced health-related quality of life.6 Hence, recovery of erectile function is crucial to improve the quality of sexual life, interpersonal relationship, and emotion in men with ED. The first-line therapy of ED applies a phosphodiesterase type 5 (PDE5) inhibitor combined with lifestyle modification.2,7 Tadalafil represents a selective, reversible PDE5 inhibitor, which was firstly utilized for on-demand treatment.
Factors and Strategies for Maximizing Cialis Effectiveness
Previous pooled analysis of 5 randomized placebo-controlled trials demonstrated that tadalafil at 2.5–20 mg taken orally on demand for 12 weeks significantly improves the erectile function and success rate of intercourse attempts in men with ED.8 Two-year extended on-demand use of tadalafil was also supported by long-term safety data, with the most common adverse events (AEs) being headache, dyspepsia, nasopharyngitis, and back pain.9 Currently, daily administration of tadalafil is also common in clinical practice. Previous meta-analyses revealed that daily use of tadalafil has similar short-term efficacy as on-demand use,10,11 but better effects on improving erectile function and safety compared with long-term treatment.12 Furthermore, patients administered daily tadalafil did not need to take tadalafil in advance before sexual activity, resulting in higher compliance.13 However, these previous studies were mostly performed in Western populations. Due to disparate treatment patterns across races and countries,14 evidence on long-term efficacy and safety of daily tadalafil original cialis 20mg in Chinese men with ED is crucial but scarce. Additionally, since tadalafil was approved for ED treatment in China in 2013, monitoring its long-term safety and effectiveness post marketing may provide guidance for clinical application.15 A post-marketing, multicenter, randomized, open-label trial was performed to assess the long-term safety and efficacy of tadalafil once daily in Chinese men with ED. The 1-year interim results have demonstrated that once-daily tadalafil administration improves the International Index of Erectile Function-Erectile Function (IIEF-EF) and Sexual Encounter Profile (SEP) scores in Chinese men with ED, with 43.7% of patients regaining normal erectile function with no new safety signals.16 Here, we performed a 2-year final analysis of this trial to provide evidence about long-term application of tadalafil once daily in Chinese men with ED. For further discussion of these and other risks and uncertainties, see Lilly's filings with the United States Securities and Exchange Commission. Lilly undertakes no duty to update forward-looking statements. The long-term safety and effectiveness of once-daily tadalafil is crucial, but limited data are available in Chinese patients with erectile dysfunction (ED).
| Age Range | Common Conditions Suitable For | Contraindications |
|---|---|---|
| 40-60 years | Erectile dysfunction, BPH | Nitrate therapy, severe liver failure |
| 60+ years | Age-related sexual health issues | Uncontrolled hypertension |
| Men with Diabetes | Diabetes-related erectile issues | Recent heart attack or stroke |
In this post-marketing, multicenter, randomized, open-label trial with 2-year follow-up, 635 ED cases were randomized to receive daily oral tadalafil 2.5 mg or 5 mg for 3 months, of whom 580 continued once-daily tadalafil 5 mg for 21 months.
| Dosage | Suitable for | Typical administration schedule |
|---|---|---|
| 2.5 mg | Mild ED, daily preference | Once every 24 hours |
| 5 mg | Mild to moderate ED | Once every 24 hours |
| 10 mg | Moderate ED, as needed | Prior to anticipated activity |
| 20 mg | Severe ED, occasionally | As needed, not daily |
Treatment-emergent adverse events in the 12-month and 24-month period were similar, with the most common being viral upper respiratory tract infection, upper respiratory tract infection, and headache. Significant improvement from baseline in the International Index of Erectile Function-Erectile Function (IIEF-EF) score was detected at month 12 (least squares mean [LSM] change: 7.9, 95% confidence interval [CI]: 7.5–8.4, P < 0.001) and was maintained to month 24 (LSM change: 8.6, 95% CI: 8.1–9.0, P < 0.001). The proportions of patients regaining normal erectile function (IIEF-EF score ≥26) were 43.7% and 48.0% at months 12 and 24, respectively. Global Assessment Questionnaire results showed improved erection function in 97.5% of patients and improved ability to engage in sexual activity in 95.9% of patients at month 12; these values were 96.1% and 95.0% at month 24, respectively. The quality of sexual life score based on the Sexual Life Quality Questionnaire (SLQQ) was increased by 52.2% at month 12 and by 55.3% at month 24 (both P < 0.001). The treatment satisfaction score determined by SLQQ (mean ± standard deviation) was 62.4 ± 21.0 at month 12 versus 65.9 ± 20.2 at month 24. Two-year daily application of tadalafil 5 mg in Chinese men with ED showed a favorable safety profile and durable improvement in sexual performance and satisfaction.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Cialis Black | 80mg | 30 + 2 Pills | 89.11€ 84.87€ | |
| Cialis Soft Tabs | 20mg | 120 + 6 Pills | 248.64€ 236.80€ | |
| Cialis Soft Tabs | 20mg | 30 + 4 Pills | 87.43€ 83.27€ | |
| Cialis Black | 80mg | 360 + 20 Pills | 639.78€ 609.31€ | |
| Cialis Original | 20mg | 12 Pills | 78.32€ 74.59€ | |
| Cialis Generic | 40mg | 30 + 4 Pills | 74.97€ 71.40€ | |
| Cialis Generic | 2.5mg | 180 + 10 Pills | 154.86€ 147.49€ | |
| Cialis Generic | 5mg | 20 Pills | 41.99€ 39.99€ | |
| Cialis Generic | 5mg | 360 + 10 Pills | 268.08€ 255.31€ | |
| Cialis Black | 80mg | 90 + 6 Pills | 207.88€ 197.98€ | |
| Cialis Professional | 40mg | 120 + 4 Pills | 436.68€ 415.89€ | |
| Cialis Original | 20mg | 4 Pills | 41.99€ 39.99€ | |
| Cialis Professional | 20mg | 60 + 2 Pills | 183.83€ 175.08€ | |
| Cialis Professional | 20mg | 10 Pills | 48.29€ 45.99€ | |
| Cialis Generic | 2.5mg | 30 + 4 Pills | 51.95€ 49.48€ | |
| Cialis Professional | 20mg | 120 + 4 Pills | 291.68€ 277.79€ | |
| Cialis Generic | 20mg | 30 + 4 Pills | 68.05€ 64.81€ |
Erectile dysfunction (ED) refers to the failure of achieving or maintaining satisfying function during sexual activities due to endocrine, psychological, or cardiovascular anomalies. Approximately 20%–41% of men report ED worldwide.1–3 The incidence of ED is 14.2% in young adults (18–31 years), among whom moderate-to-severe ED accounts for 2.9%.4 In China, the incidence of ED among men aged >40 years is 40.6% and increases with age (from 18.1% in men aged 40–49 years to 81.6% in men aged ≥70 years).5 Although ED is not life-threatening, it is independently associated with reduced health-related quality of life.6 Hence, recovery of erectile function is crucial to improve the quality of sexual life, interpersonal relationship, and emotion in men with ED. The first-line therapy of ED applies a phosphodiesterase type 5 (PDE5) inhibitor combined with lifestyle modification.2,7 Tadalafil represents a selective, reversible PDE5 inhibitor, which was firstly utilized for on-demand treatment. Previous pooled analysis of 5 randomized placebo-controlled trials demonstrated that tadalafil at 2.5–20 mg taken orally on demand for 12 weeks significantly improves the erectile function and success rate of intercourse attempts in men with ED.8 Two-year extended on-demand use of tadalafil was also supported by long-term safety data, with the most common adverse events (AEs) being headache, dyspepsia, nasopharyngitis, and back pain.9 Currently, daily administration of tadalafil is also common in clinical practice.
Further information
It's not possible to determine if these events are related directly to the ED tablets or to other factors. If you have a sudden decrease or loss of vision or hearing, stop taking any ED tablet, including Cialis and call a healthcare provider right away. protect a man or his partner from sexually transmitted diseases, including HIV serve as a male form of birth control For additional information, talk to your doctor and see full Patient Information at and Prescribing Information at or visit for more information. * The brand listed is a trademark of its respective owner and is not a trademark of Eli Lilly and Company. The maker of this brand is not affiliated with and does not endorse Eli Lilly and Company or its products.
Erectile dysfunction explained
Lilly, a leading innovation-driven corporation, is developing a growing portfolio of pharmaceutical products by applying the latest research from its own worldwide laboratories and from collaborations with eminent scientific organizations. Headquartered in Indianapolis, Ind., Lilly provides answers – through medicines and information – for some of the world's most urgent medical needs. Additional information about Lilly is available at This press release contains forward-looking statements about the use of Cialis for the treatment of erectile dysfunction reflects Lilly's current beliefs. However, as with any pharmaceutical product under development, there are substantial risks and uncertainties in the process of development, commercialization, and regulatory review. There is no guarantee that the product will receive additional regulatory approvals. Previous meta-analyses revealed that daily use of tadalafil has similar short-term efficacy as on-demand use,10,11 but better effects on improving erectile function and safety compared with long-term treatment.12 Furthermore, patients administered daily tadalafil did not need to take tadalafil in advance before sexual activity, resulting in higher compliance.13 However, these previous studies were mostly performed in Western populations.
Why Daily Cialis Is Often Used Alongside TRT
Efficacy endpoints included changes in IIEF-EF domain questionnaire score17 from baseline to months 18 and 24, the proportions of patients achieving normal erectile function (IIEF-EF score ≥26) at months 18 and 24, and the proportions of patients responding “Yes” to the GAQ18 at months 3, 12, and 24, which were not reported in the previous interim analysis. The GAQ consists of 2 questions: “has the treatment you have been taking during the study improved your erection function?” (question 1 [Q1]) and “has the treatment improved your ability to engage in sexual activity?” (question 2 [Q2]). Patients answering “No” to Q1 were assumed to have also answered “No” to Q2. Safety endpoints included treatment-emergent AEs (TEAEs), treatment-related AEs (TRAEs), and serious AEs (SAEs). The severity of TEAEs and whether AEs were related to treatment were assessed.
How long does it take for Cialis to work?
The exploratory endpoint was the quality of sexual life at months 3, 12, and 24, as assessed by the SLQQ,19 which was not reported in the previous interim analysis. The SLQQ consists of 16 items, including 10 examining the quality of sexual life and 6 assessing the degree of satisfaction with treatment. SLQQ scores for the quality of sexual life ranged from −4 to 4 in the original version,19 but from 0 to 8 in this study, which were then multiplied by 12.5 to obtain scores ranging from 0 to 100. SLQQ scores for treatment satisfaction ranged from 1 to 6 in the original version,19 but from 0 to 5 in this study, which were then multiplied by 20 to generate scores ranging from 0 to 100. Due to disparate treatment patterns across races and countries,14 evidence on long-term efficacy and safety of daily tadalafil original cialis 20mg in Chinese men with ED is crucial but scarce. Additionally, since tadalafil was approved for ED treatment in China in 2013, monitoring its long-term safety and effectiveness post marketing may provide guidance for clinical application.15 A post-marketing, multicenter, randomized, open-label trial was performed to assess the long-term safety and efficacy of tadalafil once daily in Chinese men with ED. The 1-year interim results have demonstrated that once-daily tadalafil administration improves the International Index of Erectile Function-Erectile Function (IIEF-EF) and Sexual Encounter Profile (SEP) scores in Chinese men with ED, with 43.7% of patients regaining normal erectile function with no new safety signals.16 Here, we performed a 2-year final analysis of this trial to provide evidence about long-term application of tadalafil once daily in Chinese men with ED. In addition, the quality of sexual life using Global Assessment Questionnaire (GAQ) and Sexual Life Quality Questionnaire (SLQQ) scores was examined. This was a post-marketing, multicenter, randomized, open-label trial performed at 24 centers in China as the previous study (Supplementary Box 1).16 Chinese men with ED were enrolled from October 2014 to May 2015.
Side Effects
There is also no guarantee that the product will continue to be commercially successful. For further discussion of these and other risks and uncertainties, see Lilly's filings with the United States Securities and Exchange Commission. Lilly undertakes no duty to update forward-looking statements. The long-term safety and effectiveness of once-daily tadalafil is crucial, but limited data are available in Chinese patients with erectile dysfunction (ED). In this post-marketing, multicenter, randomized, open-label trial with 2-year follow-up, 635 ED cases were randomized to receive daily oral tadalafil 2.5 mg or 5 mg for 3 months, of whom 580 continued once-daily tadalafil 5 mg for 21 months.
Cialis and foods
Treatment-emergent adverse events in the 12-month and 24-month period were similar, with the most common being viral upper respiratory tract infection, upper respiratory tract infection, and headache. Significant improvement from baseline in the International Index of Erectile Function-Erectile Function (IIEF-EF) score was detected at month 12 (least squares mean [LSM] change: 7.9, 95% confidence interval [CI]: 7.5–8.4, P < 0.001) and was maintained to month 24 (LSM change: 8.6, 95% CI: 8.1–9.0, P < 0.001). The proportions of patients regaining normal erectile function (IIEF-EF score ≥26) were 43.7% and 48.0% at months 12 and 24, respectively. Global Assessment Questionnaire results showed improved erection function in 97.5% of patients and improved ability to engage in sexual activity in 95.9% of patients at month 12; these values were 96.1% and 95.0% at month 24, respectively. The quality of sexual life score based on the Sexual Life Quality Questionnaire (SLQQ) was increased by 52.2% at month 12 and by 55.3% at month 24 (both P < 0.001). Inclusion criteria were: 1) age ≥22 years and <70 years; 2) three-month history of ED; and 3) a monogamous sexual relationship with a female partner. Exclusion criteria were: 1) sexual disorders, including premature ejaculation or ED caused by untreated endocrine disease (e.g., hypothyroidism, hypopituitarism, and hypogonadism); 2) clinically meaningful hepatobiliary disease or renal insufficiency; 3) a history of cardiac conditions; 4) recent central nervous system injury; 5) uncontrolled diabetes; or 6) current use of nitrates, chemotherapy, androgens, antiandrogens, estrogens, anabolic steroids, or other approved or traditional Chinese medicine preparations for ED treatment.16 This study followed the Declaration of Helsinki and was approved by the ethics committee of each participating center (heading center [Peking University Third Hospital, Beijing, China] ethics Approval No. The trial was registered with ClinicalTrials.gov (NCT02224846). As described previously,16 patients were randomized to receive oral tadalafil 2.5 mg or 5 mg once daily for 3 months (randomization period). Then, the patients received tadalafil 5 mg once daily for 21 months (extension period).
- Tadalafil Cialis daily offers flexibility and reduces performance anxiety.
- It’s an easy daily pill for ongoing management.
- Men report increased spontaneity with consistent use.
- It provides reliable erections for up to 36 hours.
- The risk of side effects is manageable with medical guidance.
- It’s important to discuss health history before starting.
- Missing doses can decrease effectiveness.
- Side effects may include flushing, headache, or dizziness.
- Alcohol can intensify side effects.
- Store medication properly, out of reach of children.
- Regular check-ins with your doctor enhance safety.
- Use as part of a comprehensive sexual health plan.
Follow-up was performed at months 1, 3, 6, 12, 18, and 24. The cut-off date of data was July 19, 2017. The primary endpoint of this trial was the 12-month safety of tadalafil once-daily treatment, which was reported in the interim analysis.16 This study assessed the 24-month efficacy and safety. Efficacy endpoints included changes in IIEF-EF domain questionnaire score17 from baseline to months 18 and 24, the proportions of patients achieving normal erectile function (IIEF-EF score ≥26) at months 18 and 24, and the proportions of patients responding “Yes” to the GAQ18 at months 3, 12, and 24, which were not reported in the previous interim analysis.
What is Daily Cialis (Tadalafil 5 mg)?
In addition, the quality of sexual life using Global Assessment Questionnaire (GAQ) and Sexual Life Quality Questionnaire (SLQQ) scores was examined. This was a post-marketing, multicenter, randomized, open-label trial performed at 24 centers in China as the previous study (Supplementary Box 1).16 Chinese men with ED were enrolled from October 2014 to May 2015. Inclusion criteria were: 1) age ≥22 years and <70 years; 2) three-month history of ED; and 3) a monogamous sexual relationship with a female partner. Exclusion criteria were: 1) sexual disorders, including premature ejaculation or ED caused by untreated endocrine disease (e.g., hypothyroidism, hypopituitarism, and hypogonadism); 2) clinically meaningful hepatobiliary disease or renal insufficiency; 3) a history of cardiac conditions; 4) recent central nervous system injury; 5) uncontrolled diabetes; or 6) current use of nitrates, chemotherapy, androgens, antiandrogens, estrogens, anabolic steroids, or other approved or traditional Chinese medicine preparations for ED treatment.16 This study followed the Declaration of Helsinki and was approved by the ethics committee of each participating center (heading center [Peking University Third Hospital, Beijing, China] ethics Approval No. The trial was registered with ClinicalTrials.gov (NCT02224846).
Drug forms and strengths: 2.5 mg, 5 mg, 10 mg, 20 mg
As described previously,16 patients were randomized to receive oral tadalafil 2.5 mg or 5 mg once daily for 3 months (randomization period). Then, the patients received tadalafil 5 mg once daily for 21 months (extension period). Follow-up was performed at months 1, 3, 6, 12, 18, and 24. The cut-off date of data was July 19, 2017. The primary endpoint of this trial was the 12-month safety of tadalafil once-daily treatment, which was reported in the interim analysis.16 This study assessed the 24-month efficacy and safety. The GAQ consists of 2 questions: “has the treatment you have been taking during the study improved your erection function?” (question 1 [Q1]) and “has the treatment improved your ability to engage in sexual activity?” (question 2 [Q2]). Patients answering “No” to Q1 were assumed to have also answered “No” to Q2. Safety endpoints included treatment-emergent AEs (TEAEs), treatment-related AEs (TRAEs), and serious AEs (SAEs).
| Side Effect | Frequency | Severity | Notes |
|---|---|---|---|
| Headache | Common | Mild | Usually resolves quickly |
| Flushing | Common | Mild | Due to vasodilation |
| Nasal congestion | Moderate | Mild | Can cause discomfort |
| Dizziness | Less common | Mild | Exercise caution when standing |
| Back pain | Rare | Mild | Usually resolves in a few days |
The severity of TEAEs and whether AEs were related to treatment were assessed. The exploratory endpoint was the quality of sexual life at months 3, 12, and 24, as assessed by the SLQQ,19 which was not reported in the previous interim analysis.
Comparing daily vs. as-needed tadalafil use
Patient resources
The SLQQ consists of 16 items, including 10 examining the quality of sexual life and 6 assessing the degree of satisfaction with treatment. SLQQ scores for the quality of sexual life ranged from −4 to 4 in the original version,19 but from 0 to 8 in this study, which were then multiplied by 12.5 to obtain scores ranging from 0 to 100. SLQQ scores for treatment satisfaction ranged from 1 to 6 in the original version,19 but from 0 to 5 in this study, which were then multiplied by 20 to generate scores ranging from 0 to 100.