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Related Concept Videos

Dosage Regimen: Fixed Dose01:01

Dosage Regimen: Fixed Dose

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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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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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Designing a dosage regimen, which refers to the manner of drug administration, is a complex process involving the selection of drug dose, route, and frequency. This process is underpinned by pharmacokinetic parameters derived from tests and population averages. These parameters are then tailored to patient-specific variables such as diagnosis, demographics, and allergy status. Once therapy commences, therapeutic response monitoring is critical and achieved through clinical and physical...
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Dose Size and Dosing Frequency: Determination Methods01:21

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Determining the optimal dose size and dosing frequency in pharmacotherapy is crucial for achieving therapeutic effectiveness while minimizing adverse effects. This article explores the methodologies employed in determining these parameters, focusing on their significance and interplay to tailor dosing regimens.Dose Size: Dose size refers to the amount of a drug administered in a single dose. It is determined based on the drug's pharmacodynamics and pharmacokinetics properties and...
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A loading dose is an essential pharmacological strategy to rapidly achieve the target plasma drug concentration necessary for an immediate therapeutic effect. This approach is especially critical for drugs characterized by slow absorption or extended half-lives, where delaying therapeutic plasma levels could compromise treatment outcomes. By administering a loading dose, clinicians ensure a prompt onset of drug action, even for agents with complex pharmacokinetic profiles.Achieving steady-state...
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Related Experiment Video

Updated: May 6, 2026

Disposable Dosators for Pulmonary Insufflation of Therapeutic Agents to Small Animals
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Metered dose inhalers: a need for dose counters.

Shaun Holt1, Avrille Holt, Mark Weatherall

  • 1P3 Research, Wellington, New Zealand.

Respirology (Carlton, Vic.)
|February 5, 2005
PubMed
Summary

Patients cannot accurately determine when their metered dose inhalers (MDIs) are empty. This leads to underdosing or wastage, impacting asthma medication delivery and patient outcomes.

Area of Science:

  • Respiratory medicine
  • Pharmaceutical sciences
  • Patient adherence

Background:

  • Metered dose inhalers (MDIs) are crucial for delivering respiratory medications like salbutamol.
  • Accurate MDI usage is essential for effective disease management.
  • Patients' ability to determine MDI emptiness is often overestimated.

Purpose of the Study:

  • To investigate patient capacity in assessing the remaining doses in a metered dose inhaler (MDI).
  • To evaluate the accuracy of patient-based methods for determining MDI expiration.

Main Methods:

  • 17 patients used the 'shaking method' to estimate remaining doses in partially emptied salbutamol MDIs.
  • 100 patients collected discarded MDIs, which were then weighed to estimate used doses.

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Main Results:

  • The 'shaking method' resulted in an overestimation of remaining doses by approximately 40.
  • MDIs labeled for 200 doses delivered a mean of 224 doses (range: 155-289) before discard.

Conclusions:

  • Patients demonstrate a significant inability to accurately determine when an MDI is empty.
  • This inaccuracy leads to suboptimal drug delivery for most patients and potential drug wastage for others.
  • Improved strategies are needed to guide patients on MDI disposal to ensure adequate medication delivery.