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Dosage Regimens: Partial Pharmacokinetic Parameters01:01

Dosage Regimens: Partial Pharmacokinetic Parameters

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It is not uncommon for complete drug pharmacokinetic profiles to remain elusive in pharmacokinetics. This necessitates certain educated assumptions by pharmacokineticists to determine appropriate dosage regimens without comprehensive pharmacokinetic data from animal or human studies. One prevalent assumption is setting the bioavailability factor, denoted as F, to 1 or 100%. This assumption caters to the scenario where a drug doesn't achieve full systemic absorption, resulting in the patient...
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Dosage Regimen: Individualization01:24

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Individualization in dosing regimens is the customization of medication doses for individual patients. Its necessity arises from the goal of maximizing therapeutic benefits while minimizing risks. This approach is pivotal because human responses to drugs can vary widely; what is effective for one person may be inadequate or excessive for another. Interpatient (intersubject) variability refers to differences in drug responses between individuals, while intrapatient (intrasubject) variability...
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Understanding how a drug's concentration fluctuates within the body over time is crucial in pharmacokinetics, particularly with multiple oral doses. A graphical representation of multiple oral dosages provides insight into these dynamics. Typical accumulation curves of a drug's concentration in the body reveal a sawtooth pattern, indicating periodic peaks and troughs correlating with each dose administration and the drug's subsequent elimination.The plasma concentration at any time during an...
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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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Inhaled medications are crucial for managing chronic obstructive pulmonary disease (COPD) and asthma. They are essential for effective treatment and control, ensuring optimal respiratory health and well-being. Inhaled medication delivers drugs directly to the lungs, providing a rapid onset of action and reducing systemic side effects compared to oral or injectable medications. Three primary types of inhalation devices are used to administer these medications: nebulizers, metered-dose inhalers...
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Regimen complexity and medication nonadherence in elderly patients.

Andrea Corsonello1, Claudio Pedone, Fabrizia Lattanzio

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Summary

Medication nonadherence in elderly patients is linked to complex drug regimens, specifically multiple daily dosing. Assistance from foreign caregivers also independently correlates with poor adherence to prescribed therapies.

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Area of Science:

  • Geriatric Medicine
  • Pharmacology
  • Patient Adherence Research

Background:

  • Medication nonadherence is a significant challenge in elderly patient care.
  • Understanding factors contributing to nonadherence is crucial for improving therapeutic outcomes.

Purpose of the Study:

  • To investigate if regimen complexity, measured by the number of daily drug administrations, influences medication nonadherence in elderly patients.
  • To identify correlates of poor adherence in an elderly inpatient population.

Main Methods:

  • A study involving 690 elderly patients (over 64 years) admitted to Italian medical and long-term care wards.
  • Self-reported medication adherence was assessed using a single-question per drug method, with caregiver input for impaired patients.
  • Multivariable logistic regression was employed to identify independent correlates of nonadherence.

Main Results:

  • Nonadherence to at least one drug was observed in 6.4% of patients.
  • Use of multiple daily dosing drugs (OR 2.99) and assistance by foreign caregivers (OR 2.17) were significant independent predictors of nonadherence.
  • Age, frailty indexes, and the total number of prescribed drugs were not significant correlates.

Conclusions:

  • Regimen complexity, particularly multiple daily dosing, is an independent correlate of medication nonadherence in the elderly.
  • The type of caregiver assistance also plays a significant role in medication adherence for this population.