Monday, July 7, 2008

Dermatological Drug Dosage in the Elderly


Changes in Pharmacodynamics

Pharmacodynamic considerations include receptor number and affinity, signal transduction mechanisms, cellular responses, and homeostatic regulation.[59] Sensitivity to certain drugs may be either increased or decreased in the elderly, e.g., sensitivity to benzodiazepines is greater in older patients,[60] as is the response to some opioids and anticoagulants.

Conversely, the elderly seem to be less responsive to certain β-adrenoceptor agonists and antagonists.[27] Simons, et al. studied H1-receptor sensitivity to hydroxyzine by measuring changes in suppression of histamine-induced wheal and flare and suggested an enhanced suppression of H1-receptor activity in the elderly.[24]  Printer- Friendly Email This

Skin Therapy Lett.  2006;11(8):1-7.  ©2006
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