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In 34 men from a multicenter, phase 3 study of a transdermal T patch system for TD, nightly applications of 2 patches (5.0 mg/day) resulted in peak levels occurring in the morning after application and decreasing slowly until system removal, mimicking the circadian patterns reported in healthy, young men.52 Esterification of T at the 17β‐position with undecanoic acid results in a longer‐acting IM TTh option that increases treatment intervals compared with that of other T esters.33, 38 The efficacy and safety of 750 mg IM TU were evaluated in an open‐label, 84‐week, phase 3 clinical trial of 130 men with TD.39 Enrolled men received 750 mg TU in 3 ml of castor oil (250 mg/ml) by deep IM injections administered at baseline, week 4, and every 10 weeks thereafter through 9 injections. The manufacturer of TE, supplied as 5 ml (200 mg/ml) in sesame oil and available in multiple‐dose vials, recommends that the starting dose of IM TE injections be 50 to 400 mg every 2 to 4 weeks.37 A study evaluated the relative efficacy of four different dosage regimens in 23 men with primary hypogonadism.36 The men received one of the four following regimens—100 mg weekly, 200 mg every 2 weeks, 300 mg every 3 weeks, or 400 mg every 4 weeks—and mean serum T concentrations were assessed once weekly during the initial 12‐week treatment period. Consistent with a previous study of SC TE,32 SC weekly dosing achieves stabilized physiologic T levels over a one‐week dosing interval after injection, and minimizes large peak and trough differences as seen with some other TTh.31
TL;DR TRT (Testosterone Replacement Therapy) is a testosterone-specific treatment,... Hone’s at-home hormone assessment can determine if you qualify for treatment. Research has shown this method of TRT is not just effective, but also ensures you administer the same dose every single time (3). Testosterone injections are often the most popular form of TRT, and they’re pretty easy to do on your own (11).
While patients experience 3 Cmax peaks in 1 day because of the required 3 daily doses, only 3.3% of patients had a Cmax between 62.4 and 86.7 nmol/L (1800–2500 ng/dl). With the 60 mg/day dose, mean TT concentrations were 15.8 nmol/L (456 ng/dl) and 17.6 nmol/L (508 ng/dl) on days 15 and 120, respectively; peak T levels were reached at 2 h post‐application, and T peak‐to‐trough ratios were maintained around 3 from day 15 to 120. The primary efficacy endpoint was met, with 77.5% (100/129) of patients achieving Cavg within the normal range, defined as 10.4 to 39.5 nmol/L (300–1140 ng/dl), on day 90. AndroGel® is available in 1.0% and 1.62% concentrations.62, 63 Topical AndroGel® 1.0% is offered as a unit‐dose packet containing 2.5 g or 5.0 g of gel, equivalent to 25 or 50 mg of T, respectively.62 A randomized, 180‐day study of 227 men with TD evaluated the PK profile and tolerability of AndroGel® 1.0% at two dosages (50 and 100 mg/day) compared with the T patch (5 mg/day).64 The study was double‐blinded until day 90 for the T gel groups, after which patients could elect to continue with the long‐term follow‐up study and receive any dose adjustments as necessary. For all treatment regimens, peak T levels occurred at the first month after pellet insertion; serum T levels gradually declined to baseline by 6 months for the two 600 mg regimens, but remained significantly elevated after 6 months at the 1200 mg dose. Serum T levels peaked approximately 7 days after each injection, with a mean Cmax of 30.9 ± 11.9 nmol/L (890.6 ng/dl) after the third IM TU injection. For example, product sheets suggest checking testosterone levels pre-application for Testogel® and Testim®, and 2 hours after application for Tostran®.
The hormonal peaks have been found to occur in the morning for progesterone, in the afternoon for FSH and LH, and during the night for oestradiol.9 Oestradiol, progesterone, follicle-stimulating hormone (FSH) and luteinising hormone (LH) show significant 24-hour rhythms during the follicular phase of the menstrual cycle. Thus, the timing of a TSH sample may only be of relevance if treatment decisions are being based on minor changes in TSH level. Frequent blood-sampling techniques have demonstrated the pulsatile nature of GH secretion, with approximately eight peaks per 24-hour period, predominately at night. Generally, ordering a random growth hormone (GH) level is unhelpful; the results will be difficult to interpret. Your body’s rhythm matters—and timing is everything. By combining symptom tracking with lab data and personalized care, you can achieve steady levels and long-term results with fewer side effects.
It’s worth noting that while testosterone levels may peak within a few days, the full effects of the treatment may not be noticeable for several weeks or even months. Men using nasal and oral T products are able to achieve mean serum T levels that are within the normal range, but they experience several T peaks and troughs throughout the day because of the multiple daily dosing regimens required (2 or 3 times/day). At week 12, steady‐state T concentrations within 20.1 to 24.9 nmol/L (580–718 ng/dl) were achieved by 87% (71/82) of patients, a slightly lower percentage than in another study where 92% of men achieved a Cavg within the normal range following TBS application.84 The time‐averaged steady‐state Cavg measured over the two consecutive 12‐h dosing intervals was 18.7 ± 5.9 nmol/L (540 ± 170 ng/dl), with a peak‐to‐trough ratio of 3.3 (Cmax of 34.3 ± 12.5 nmol/L, or 990 ± 360 ng/dl; Cmin of 10.4 ± 4.2 nmol/L, or 300 ± 120 ng/dl). In a phase 3 study evaluating the efficacy and safety of TESTAVAN® 2% gel over 90 days, 76.1% of men achieved average T concentration of 10.4–36.4 nmol/L (300–1050 ng/dl) on day 90.75 Depending on dose, T levels peaked approximately 2–4 h post‐application and decreased to pre‐application levels within 12 h, mirroring the natural diurnal rhythm of male T. After the first application of either 5 g or 10 g T gel, mean Cavg, Cmax, and Cmin T levels were within the normal physiological range (values ranged from 7.9 ± 0.5 to 25.9 ± 1.4 nmol/L; 228 ± 14 to 747 ± 40 ng/dl).64 The Cavg, Cmax, and Cmin following 90 days of 10 g T gel application were 27.5 nmol/L (793 ng/dl), 41.7 nmol/L (1203 ng/dl), and 17.4 nmol/L (502 ng/dl), respectively, compared with 19.2 nmol/L (554 ng/dl), 29.3 nmol/L (845 ng/dl), and 12.3 nmol/L (355 ng/dl) with 5 g T gel.64 At day 90, peak T levels were reached after 4 and 8 h with 5 g and 10 g T gel application, respectively. In a study of 11 men with hypogonadism, every‐other‐week administration of 200 mg IM TC caused a threefold rise in serum T, with peak values occurring between 2 to 3 days (38.4 ± 15.3 nmol/L; 1108 ± 440 ng/dl) and 4 to 5 days (38.6 ± 10.3 nmol/L, or 1112 ± 297 ng/dl) post‐injection.35 Similarly, E2 levels also increased almost threefold.
"Many studies that look at testosterone levels take an amount of people across these ages and test them for their T levels," says McDevitt. McDevitt says she sees older men who live a healthy lifestyle in their fifties who have the testosterone levels of a man in his thirties. A combination of age, genetics, and pre-existing medical conditions determines your testosterone levels. Follow‑up visits at six weeks allow us to adjust your dose based on how you feel and your lab results. Depressive symptoms, anxiety and concentration continue to improve through weeks 6–8, and many patients report feeling more motivated and sociable. When you finally decide to start testosterone replacement therapy (TRT), it’s natural to ask, "When will I feel better? - https://www.shlakoblock.com/joycelynhogben
