I'm on Test' replacement and the last 2 times I've gone in the outside of my thighs. Now my results have came back and they're wanting to change my dose from once every 12 weeks to 10, but I think it's it's cause of where I went not because my body/metabolism as changed.
Should I just get it every 10 weeks or sort it out? :-/
From your injection protocol I would assume you're using Reandron 1000mg... The information fact-sheet (below) states your doctor may decide to switch to 10 weeks or less after the first injection, apparently to obtain more stable blood concentrations sooner...
http://www.medsafe.govt.nz/Consumers/cmi/r/reandron.pdf
Glute injections are recommended.. More bio-availability I believe than quads or delts..?
Bioavailability A measure of the amount of drug that is actually absorbed from a given dose.
To quote Big Cat:
Interesting point from Minto et al: Injection site and volume do not seem to affect half life, but for some inexplicable reason the glute 1ml deca shot had a much higher bio-availability (AUC of 78% I think to 53-56% for the other three treatments, quad, delts) For whatever reason injecting the lower volume in the bigger muscle resulted in more of the drug being taken up in the system.....
http://jpet.aspetjournals.org/content/281/1/93.full
More on Reandron 1000:
Comparison of a new long-acting testosterone undecanoate formulation vs testosterone enanthate for intramuscular androgen therapy in male hypogonadism.
Minnemann T, Schubert M, Freude S, Hübler D, Gouni-Berthold I, Schumann C, Christoph A, Oettel M, Ernst M, Mellinger U, Krone W, Jockenhövel F.
Source
Clinic and Outpatient Department of Internal Medicine, University Clinic, Cologne, Germany.
Abstract
OBJECTIVE:
To assess the efficacy and safety of a novel long-acting im testosterone undecanoate (TU) formulation in comparison with testosterone enanthate (TE).
SUBJECTS AND METHODS:
An open-label, randomized, prospective clinical trial in 40 hypogonadal men (baseline serum testosterone levels <5 nmol/l), randomly assigned to 250 mg TE/3 weeks (no.=20) or 1000 mg TU im every 6 to 9 weeks for 30 weeks (no.=20). Subsequently, 32/40 men continued the study for another 114 weeks, now receiving TU 1000 mg/12 weeks.
RESULTS:
TU and TE produced no statistically significant improvements in grip strength over the first 30 weeks, which only occurred after approximately 90 weeks when all subjects received TU. There were no changes in body mass index with TU and TE, neither in the follow-up period when all patients received TU. But ratios of waist to hip circumferences declined in the longer term. Total serum cholesterol, LDL cholesterol, and triglycerides declined over the first 30 weeks, while plasma HDL also declined. Plasma LDL decreased further under long-term TU therapy, while HDL then increased. Hemoglobin and hematocrit values significantly increased over the first 30 weeks in both treatment groups and then no further increase was observed. Levels did not exceed the upper limit of normal. In both treatment groups, serum prostate specific antigen levels rose slightly after 30 weeks, with no further increase over the first 12 months, remaining stable within the normal range. Plasma T before the following TU injection was above the lower limit of reference values. Four injections per year are adequate.
CONCLUSIONS:
Administration of TU every 12 weeks is at least as safe and efficacious for treatment of hypogonadal men as TE, with a substantially lower frequency of administration. Follow-up over 114 weeks, when all subjects received TU, showed an excellent profile of efficacy and safety.
http://www.ncbi.nlm.nih.gov/pubmed/18852533
Intramuscular testosterone undecanoate: pharmacokinetic aspects of a novel testosterone formulation during long-term treatment of men with hypogonadism.
Schubert M, Minnemann T, Hübler D, Rouskova D, Christoph A, Oettel M, Ernst M, Mellinger U, Krone W, Jockenhövel F.
Source
Klinik II und Poliklinik für Innere Medizin der Universität zu Köln, Germany.
Abstract
In an open-label, randomized, prospective trial, we investigated pharmacokinetics and several efficacy and safety parameters of a novel, long-acting testosterone (T) undecanoate (TU) formulation in 40 hypogonadal men (serum testosterone concentrations < 5 nmol/liter). For the first 30 wk (comparative study), the patients were randomly assigned to receive either 10 x 250 mg T enanthate (TE) im every 3 wk (n = 20) or 3 x 1000 mg TU im every 6 wk (loading dose) followed by 1 x 1000 mg after an additional 9 wk (n = 20). In a follow-up study, observation continued in those patients who completed the comparative part and opted for TU treatment (8 x 1000 mg TU every 12 wk in former TU patients and 2 x 1000 mg TU every 8 wk plus 6 x 1000 mg every 12 wk in former TE patients) for an additional 20-21 months. Here we report only the pharmacokinetic aspects of the new TU formulation for the first approximately 2.5 yr of treatment. At baseline, serum T concentrations did not significantly differ between the two study groups. In the TE group, mean trough levels of serum T were always less than 10 nmol/liter before the next injection, whereas in the TU group, mean trough levels of serum T were 14.1 +/- 4.5 nmol/liter after the first two doses (6-wk intervals) and 16.3 +/- 5.7 nmol/liter after the 9-wk interval at wk 30. The mean serum levels of dihydrotestosterone and estradiol also increased in parallel to the serum T pattern and remained within the normal range. In the follow-up study, the former TU patients (n = 20) received eight TU injections at 12-wk intervals, and the TE patients (n = 16) switched to TU and initially received two TU injections at 8-wk intervals (loading) and continued with six TU injections at 12-wk intervals (maintenance). This regimen resulted in stable mean serum trough levels of T (ranging from 14.9 +/- 5.2 to 16.5 +/- 8.0 nmol/liter) and estradiol (ranging from 98.5 +/- 45.2 to 80.4 +/- 14.4 pmol/liter). The present study has shown that 1000 mg TU injected into male patients with hypogonadism at 12-wk intervals is well tolerated and leads to T levels within normal ranges, using four instead of 17 or more TE injections per year. An initial loading dose of either 3 x 1000 mg TU every 6 wk at the beginning of hormone substitution or 2 x 1000 mg TU every 8 wk after switching from the short-acting TE to TU were found to be a adequate dosing regimens for starting of treatment with the long-acting TU preparation.
http://www.ncbi.nlm.nih.gov/pubmed/...+Long-Term+Treatment+of+Men+with+Hypogonadism