Priming instructions for Tostran 2% gel require updating

madman

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Brief description of the problem

Kyowa Kirin Limited has notified MHRA that the priming instructions in the current PIL for Tostran 2% gel require updating.


Following a manufacturing change to the Tostran 2% gel dosage pump/dispenser system, the manufacturer has observed that the priming instruction requires changing. Data from the end of shelf life in-use testing has shown that the number of actuations required to prime the device to achieve correct dosing increases over time. This means that more pumps to prime the device being using it for the first time are now required. If these instructions are not followed then a less accurate first dose may be delivered. The Patient Information Leaflet and Summary Product Information will be updated to include these the new priming instructions, subject to approval by MHRA.
 

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Predict estradiol, DHT, and free testosterone levels based on total testosterone

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Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

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The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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