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Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
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Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

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Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...
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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
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Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
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Updated: Dec 23, 2025

Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People
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[Thyroid hormone therapy in old age].

K A Iwen1, G Brabant2

  • 1Medizinische Klinik I, Experimentelle und Klinische Endokrinologie, Universitätsklinikum Schleswig-Holstein, Ratzeburger Allee 160, 23538, Lübeck, Deutschland. alexander.iwen@uksh.de.

Der Internist
|April 26, 2020
PubMed
Summary
This summary is machine-generated.

Thyroid hormone therapy does not improve outcomes for subclinical hypothyroidism when thyroid-stimulating hormone (TSH) is below 10 mIU/l. Treatment is generally not recommended for elderly patients with TSH levels below this threshold due to potential side effects.

Keywords:
HypothyroidismMorbidityQuality of lifeThyroid-stimulating hormoneThyroxine

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Area of Science:

  • Endocrinology
  • Geriatrics
  • Internal Medicine

Background:

  • Overt hyperthyroidism treatment reduces mortality and morbidity.
  • Evidence for treating subclinical hypothyroidism, especially in the elderly, is unclear.
  • Elderly individuals have altered hypothalamo-pituitary regulation and hormone response.

Purpose of the Study:

  • To review evidence on treating hypothyroidism in the elderly.
  • To determine appropriate initiation thresholds and therapeutic goals for thyroid hormone therapy in older adults.

Main Methods:

  • Review of original data and meta-analyses.
  • Analysis of evidence regarding morbidity and mortality in subclinical hypothyroidism.
  • Examination of treatment guidelines and prescription trends.

Main Results:

  • Thyroid hormone therapy does not alter morbidity or mortality in subclinical hypothyroidism with TSH < 7-10 mIU/l.
  • Data support a TSH threshold of 10 mIU/l for intervention, particularly in the elderly.
  • Thyroxine prescriptions have increased significantly, with TSH levels decreasing.

Conclusions:

  • Thyroid hormone substitution should generally not be initiated at TSH levels < 10 mIU/l for subclinical hypothyroidism.
  • Elderly patients are more susceptible to side effects of thyroid hormone therapy.
  • Symptoms and quality of life are not improved by thyroxine replacement in this population.