E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
To demonstrate that in patients with erectile dysfunction who have low or borderline baseline total testosterone levels, that Testim 50 mg Gel, indicated for male hypogonadism when testosterone deficiency has been confirmed, significantly improves the patient response to tadalafil (used to treat erectile dysfunction) using the Internal Index of Erectile Function (IIEF) scale. |
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MedDRA Classification |
E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To demonstrate that in patients with erectile dysfunction (ED) who are found to have low (<8 nmol/L or 231 ng/dL) or <borderline> (<12 nmol/L or 346 ng/dL) baseline total testosterone levels, Testim Gel significantly improves the patient response to tadalafil using the International Index of Erectile Function (IIEF) scale |
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E.2.2 | Secondary objectives of the trial |
To assess the safety of co-administering Testim Gel and tadalafil in the targeted patient population
To identify putative predictive factors of Testim Gel efficacy in the target population such as baseline total testosterone levels, bioavailable testosterone levels and androgen receptor Cystine Alanine Guanine (CAG) repeat number |
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E.2.3 | Trial contains a sub-study | Information not present in EudraCT |
E.3 | Principal inclusion criteria |
1. Have ED defined as a score < 26 in the "erectile function" module of the IIEF scale 2. Have a score <3 (sometimes) to both question 3 (successful penetration) and question 4 (successful maintenance of erection after penetration) of the IIEF scale 3. Have a serum total testosterone level <12 nmol/L (346 ng/dL) assayed on two samples drawn between 7 and 10 am on two separate days: -one at V1 visit performed by central lab; -one 10 to 14 days before V2 performed by central lab 4. Have not been treated with testosterone since the selection visit 5. Have not been treated with PDE5 inhibitors since the selection visit 6. Have kept the same female partner since the selection visit |
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E.4 | Principal exclusion criteria |
1. Patients having any contra-indication to tadalafil treatment: stroke within last 6 months, myocardial infarction within the last 90 days, unstable angina or angina occurring during sexual intercourse, New York Heart Association Class 2 or greater heart failure in the last 6 months, uncontrolled arrhythmias, hypotension (<90/50 mm Hg) or uncontrolled hypertension (>170/100 mm Hg), clinically significant renal (creatinine clearance <30 mL/min) or hepatic insufficiency (Child-Pugh Class C), patients receiving organic nitrates 2. Patients having any contra-indication to testosterone therapy: breast carcinoma, prostate carcinoma, suspected prostate carcinoma (PSA > 4 ng/mL), abnormal findings at the Digital Rectal Examination (DRE) 3. Patients with known hypersensitivity to tadalafil, testosterone or other drug with a similar chemical structure or any of the excipients 4. Patients having drug induced ED 5. Patients having poorly controlled diabetes defined by Glycosylated Haemoglobin (HbA1c)>10% 6. Patients having history of non-arteritic anterior ischaemic optic neuropathy 7. Patients having received any unlicensed drug within the previous 30 days 8. Patients requiring treatment during the study with drugs that are not permitted by the study protocol 9. Patients trying to have a baby or planning to in the study period. Adequate contraception such as contraceptive pill, intra uterine device, diaphragm or barrier method such as barrier contraceptive. |
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E.5 End points |
E.5.1 | Primary end point(s) |
Primary Efficacy Endpoints-Percentage of patients with a response of 4 (most times) or 5 (almost always/always) to both question 3 (successful penetration) and question 4 (successful maintenance of erection after penetration) of the IIEF at 12 weeks or at endpoint
Primary Safety Endpoints-Adverse events, proportion of patients with serum testosterone levels >35 nmol/L, RBC, Hb, Htc, fasting glucose levels, HbA1c, serum PSA, Digital rectal exam, blood pressure, ECG, biochemistry |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | Information not present in EudraCT |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | Yes |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | Yes |
E.8.2.3 | Other | No |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | Yes |
E.8.6.2 | Trial being conducted completely outside of the EEA | Information not present in EudraCT |
E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned |
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E.8.7 | Trial has a data monitoring committee | Information not present in EudraCT |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 1 |
E.8.9.1 | In the Member State concerned months | |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 3 |