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Insulin: Dosing Regimen and Adverse Effects01:16

Insulin: Dosing Regimen and Adverse Effects

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Insulin-replacement therapy usually includes both long-acting insulin (basal) and short-acting insulin (to cater to postprandial needs). In a diverse group of type 1 diabetes patients, the average daily insulin dose is typically 0.5-0.7 units/kg body weight. However, obese patients and pubertal adolescents may need more due to insulin resistance.
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Fixed-dose regimens are a common approach to administer drugs to achieve and maintain desired levels of the drug in the body. In this dosing strategy, a specific amount of medication is given at regular intervals, often multiple times a day, to ensure a consistent drug concentration in the bloodstream.
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A drug dosage regimen describes the specific instructions and schedule for administering a drug to a patient. It considers factors such as drug dosage, frequency, route of administration, and duration of treatment. Designing an appropriate dosage regimen for a patient aims to achieve a target drug concentration at the site of action.
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A rational dosage regimen considers a drug's pharmacokinetics, including its absorption, distribution, metabolism, and elimination from the body. By understanding these factors, the appropriate dosage can be determined, and the dosing schedule can be designed to achieve and maintain the desired therapeutic effect while minimizing adverse effects.
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Insulin Formulations: Types and Delivery01:27

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Insulin preparations are categorized by their duration of action into short-acting and long-acting types. Two strategies are used to modify insulin's absorption and pharmacokinetic profile: slowing the absorption post-subcutaneous injection, or altering human insulin's amino acid sequence or protein structure. These changes retain the insulin's ability to bind to the insulin receptor, but alter its behavior in solution or after injection.
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Drug Delivery: Parenteral Route01:29

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The parenteral route is a critical method of drug administration. It delivers compounds directly into the systemic circulation and bypasses the gastrointestinal tract. This approach is particularly advantageous for drugs that exhibit poor absorption or instability when administered orally.
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Updated: May 7, 2025

Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies
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Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies

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Revisiting Injectable Estrogen Dosing Recommendations for Gender-Affirming Hormone Therapy.

Micol S Rothman1, Ole-Petter R Hamnvik2, Caroline Davidge-Pitts3

  • 1Division of Endocrinology, Metabolism and Diabetes, Department of Medicine, University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, Colorado, USA.

Transgender Health
|December 30, 2024
PubMed
Summary
This summary is machine-generated.

Injectable estrogen dosages for gender-affirming care should start low. Prescribing 5 mg weekly or less of injectable estradiol helps avoid excessively high levels, ensuring safer hormone therapy.

Keywords:
estradiol cypionateestradiol levelestradiol valerategender-affirming hormone therapyinjectable estrogen dosingtransgender

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Area of Science:

  • Endocrinology
  • Gender-affirming hormone therapy

Background:

  • Injectable estrogens are recommended in guidelines for gender-affirming hormone therapy.
  • Limited data exist for transgender and gender-diverse populations regarding injectable estrogen use.
  • Concerns include assay variability and estradiol level fluctuations.

Purpose of the Study:

  • To review current practices and guideline recommendations for injectable estrogen dosages.
  • To identify trends in prescribed dosages and resulting serum estradiol levels.
  • To provide recommendations for safe initiation of injectable estrogen therapy.

Main Methods:

  • Review of existing guidelines for injectable estrogen therapy.
  • Analysis of reported serum estradiol (E2) levels in transgender and gender-diverse patients.
  • Assessment of prescribed intramuscular dosages of estradiol cypionate or valerate.

Main Results:

  • Some patients receive high-dose injectable estrogen injections, leading to supraphysiologic serum E2 levels.
  • Prescribed doses often exceed the recommended range for initiating therapy.
  • Weekly doses of 5 mg or lower are suggested to prevent supra-physiological levels.

Conclusions:

  • Initiating injectable estrogen therapy at 5 mg weekly or lower is recommended.
  • Avoiding supraphysiologic estradiol levels is crucial for safe and effective gender-affirming care.
  • Further research is needed to optimize injectable estrogen dosing for transgender and gender-diverse individuals.