Testosteroneside effects

Most common adverse reactions (incidence ≥ 2% of the TESTIM patients and greater than placebo) are application site reaction and increased hematocrit. To report SUSPECTED ADVERSE REACTIONS, contact Endo at 1-800-462-3636 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

6.1 Clinical

Studies Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. In a controlled clinical study, 304 patients were treated with TESTIM 50 mg or 100 mg or placebo gel for up to 90 days. Two hundred five patients received TESTIM 50 mg or 100 mg daily and 99 patients received placebo. Subjects could be counted in both TESTIM treatment groups if they received both 50 mg and 100 mg at different points in the study and experienced an adverse reaction at both dose levels. Adverse reactions reported by ≥ 1% of the TESTIM patients and greater than placebo are listed in Table 1.

Table 1: Incidence of Adverse Reactions (Reported by ≥ 1% of the TESTIM Patients and Greater than Placebo) in the Controlled Clinical Trial Through 90 Days Event TESTIM 50 mg (n=103) TESTIM 100 mg (n=149) Placebo (n=99) Application Site Reactions 2% 4% 3% Blood Pressure Increased 1% 1% 0% Gynecomastia 1% 0% 0% Headache 1% 1% 0% Hematocrit / hemoglobin Increased 1% 2% 0% Hot Flushes 1% 0% 0% Insomnia 1% 0% 0% Mood Swings 1% 0% 0% Smell Disorder 1% 0% 0% Spontaneous Penile Erection 1% 0% 0% Taste Disorder 1% 1% 0% The following adverse reactions occurred in fewer than 1% of patients but were greater in TESTIM groups compared to the placebo group: activated partial thromboplastin time prolonged, blood creatinine increased, prothrombin time prolonged, appetite increased, sensitive nipples, and acne. In this clinical trial of TESTIM, 6 patients had adverse reactions that led to their discontinuation.

These events included: depression with suicidal ideation, urinary tract infection, mood swings and hypertension. No TESTIM patients discontinued due to skin reaction. In one foreign Phase 3 trial, one subject discontinued due to a skin-related adverse reaction. In the pivotal US and European Phase 3 trials combined, at the 50-mg dosage strength, the percentage of subjects reporting clinically notable increases in hematocrit or hemoglobin were similar to placebo. However, in the 100-mg dose group, 2.3% and 2.8% of patients had a clinically notable increase in hemoglobin (≥ 19 g/dL) or hematocrit (≥ 58%), respectively, compared to 1.0% and 1.5% of patients in the placebo group, respectively. In the combined US and European open-label extension studies, approximately 140 patients received TESTIM for at least 6 months. The results from these studies are consistent with those reported for the US controlled clinical trial. Blood Pressure Increases In a 4-month clinical study, 24-hour ambulatory blood pressure monitoring (ABPM) was conducted on 225 patients. ABPM was conducted at baseline and at Week 16 of TESTIM therapy. A total of 113 patients had acceptable ABPM recordings at both baseline and Week 16 and were at least 85% compliant with study drug. In that group, the mean change in 24-hour systolic blood pressure (BP) and diastolic BP from baseline to end-of-treatment at Week 16 (n=113) was 2.7 mm Hg (95% CI 0.7, 4.8) and 1.1 mm Hg (95% CI -0.1, 2.3), respectively. In patients with a history of hypertension who were receiving antihypertensive therapy, the mean ABPM systolic and diastolic BP increased by 1.9 mm Hg [95% CI -1.4, 5.2] and 0.3 mm Hg [95% CI -1.6, 2.2], respectively [n=55]). In patients with no history of hypertension, the mean systolic and diastolic blood pressure increased by 2.2 mm Hg [95% CI -0.4, 4.9] and 1.1 mm Hg [95% CI -0.4, 2.7], respectively [n=56]. 3 patients (2.7%) on TESTIM, all of whom were receiving antihypertensive medications at baseline, either started new antihypertensive medications (n=3) or had their antihypertensive medication regimen adjusted (n=0) during the ABPM study. Of the 225 patients in the ABPM study who used TESTIM, 6 patients (2.7%) were reported to have either an adverse reaction of hypertension (6 patients, 2.7%) or increased blood pressure (0 patients, 0.0%). Cardiovascular Outcomes TRAVERSE was a randomized, double-blind, cardiovascular outcomes study to assess the cardiovascular (CV) safety of topical testosterone gel compared to placebo in 5198 hypogonadal men aged 45 to 80 years with a history of CV disease or with multiple CV risk factors. The primary outcome was the incidence of the composite endpoint of major adverse cardiovascular events (MACE), consisting of CV death, non-fatal myocardial infarction (MI), and non-fatal stroke. The mean duration of therapy was approximately 22 months. The mean duration of follow-up was 33 months. Approximately 61% of all patients discontinued topical testosterone gel or placebo therapy. The mean patient age (±SD) was 63.3 years, with 2452 patients aged 65 years or more (47%); 2847 (about 55%) patients had pre-existing cardiovascular disease, whereas 2357 patients (about 45%) had an elevated cardiovascular risk at baseline, and mean BMI was 35kg/m 2. Approximately 80% of patients were White, 17% were Black, and 3% were of other races or ethnic groups. Approximately 69%, 84%, and 93% had diabetes mellitus, hyperlipidemia, and hypertension, respectively. The mean serum testosterone concentration at baseline in patients receiving topical testosterone gel was 220.4 ng/dL (n=2596). The mean serum testosterone concentrations at 12 months, 24 months, 36 months, and 48 months in patients receiving topical testosterone gel were 440.5 ng/dL (n=1683), 420.9 ng/dl (n=1125), 428.7 ng/dL (n=731), and 365.2 ng/dL (n=220), respectively. For patients treated with topical testosterone gel, the incidence of MACE was 7.0% (n=182 events) and for those receiving placebo, the incidence of MACE was 7.3% (n=190 events). The study demonstrated non-inferiority of topical testosterone gel versus placebo because the upper bound of 95% CI was less than the pre-specified risk margin, of 1.5 for MACE (Hazard Ratio 0.96 [95% CI: 0.78, 1.17]). Additional Adverse Reactions Reported in TRAVERSE Additional adverse reactions reported in TRAVERSE at an incidence rate >2% in either treatment group and greater in topical testosterone gel versus placebo included: nonfatal arrythmias warranting intervention (5.2% vs 3.3%), atrial fibrillation (3.5% vs 2.4%), acute kidney injury (2.3% vs 1.5%) and bone fracture (3.5% vs 2.5%). For the adverse reaction of bone fracture, each event was adjudicated by clinical review.

6.2 Postmarketing

Experience The following adverse reactions have been identified during post-approval use of testosterone gel products. Because the reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Secondary Exposure to Testosterone in Children Cases of secondary exposure to testosterone resulting in virilization of children have been reported in postmarketing surveillance of testosterone gel products. Signs and symptoms of these reported cases have included enlargement of the clitoris (with surgical intervention) or of the penis, development of pubic hair, increased erections and libido, aggressive behavior, and advanced bone age. In most cases with a reported outcome, these signs and symptoms were reported to have regressed with removal of the testosterone gel exposure. In a few cases, however, enlarged genitalia did not fully return to age-appropriate normal size, and bone age remained modestly greater than chronological age. In some of the cases, direct contact with the sites of application on the skin of men using testosterone gel was reported. In at least one reported case, the reporter considered the possibility of secondary exposure from items such as the testosterone gel user’s shirts and/or other fabric, such as towels and sheets. Vascular Disorders Venous thromboembolism Cardiovascular Disorders Myocardial infarction, stroke Blood and Lymphatic Disorders Polycythemia