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Dosage Regimens: Designs and Approaches01:28

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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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Rational drug product design integrates knowledge of the drug’s physicochemical properties, formulation components, manufacturing techniques, and intended route of administration. Each factor influences the drug’s performance, including how it is released, absorbed, and eliminated in the body.The physicochemical properties of a drug—such as solubility, stability, and particle size—affect its compatibility with excipients and the choice of dosage form. Excipients, though pharmacologically...
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Nomograms and tabulations are vital tools used by clinicians to design accurate and individualized dosage regimens. These instruments provide a straightforward method for adjusting dosages based on individual patient characteristics, including age, weight, and physiological condition. The foundation of a drug's nomogram is population pharmacokinetic data collected and analyzed using specific models. This data simplifies complex equations, presenting them diagrammatically or tabularly for easy...
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Bioequivalence in generic drugs, such as tablets and capsules, refers to their pharmaceutical equivalence to the brand-name counterparts. However, for therapeutic equivalence, manufacturers must also consider physical attributes like size, shape, and weight (FDA Guidance for Industry, December 2003). Discrepancies in these aspects could impact patient compliance and cause medication errors. For instance, swallowing difficulties, often experienced with larger tablets or capsules, can lead to...
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Changes in polymorphic forms can significantly influence the bioavailability of poorly soluble drugs. Although the FDA defines pharmaceutical equivalence based on having the same active ingredient, dosage form, and route of administration, it does not automatically disqualify products with different polymorphic forms. This means two products with different polymorphs can still be deemed pharmaceutically equivalent. However, polymorphic differences can affect properties like wettability,...

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Disposable Dosators Intended for Dry Powder Delivery to Mice
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Dosage form design and development.

Loyd V Allen1

  • 1International Journal of Pharmaceutical Compounding Inc., Edmond, Oklahoma 73034, USA. lallen@ijpc.com

Clinical Therapeutics
|December 26, 2008
PubMed
Summary
This summary is machine-generated.

Formulating pediatric drugs requires careful consideration of drug properties, excipients, and patient factors like taste and appearance for safe and effective medications. This ensures optimal therapeutic outcomes for children.

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Area of Science:

  • Pharmaceutical Sciences
  • Drug Formulation
  • Pediatric Pharmacology

Background:

  • Pediatric drug formulation presents unique challenges in patient compliance and therapeutic efficacy.
  • A significant lack of age-appropriate drug products necessitates development by the pharmaceutical industry and compounding pharmacies.

Purpose of the Study:

  • To review the physical, chemical, and biological characteristics of drug substances and pharmaceutical ingredients for drug product preparation.
  • To discuss critical formulation aspects including stability, appearance, palatability, flavoring, sweetening, coloring, preservation, packaging, and storage.

Main Methods:

  • Literature review.
  • Analysis of presentations from professional and technical meetings.
  • Inclusion of author's lectures, books, publications, and professional experience.
  • Consultation of resources from professional societies and standards-setting bodies.

Main Results:

  • Successful dosage form design hinges on understanding the physical, chemical, and biological traits of all drug substances and excipients.
  • Materials must be compatible to yield a stable, effective, palatable, and well-tolerated drug product.
  • Key preformulation factors include particle size, crystalline structure, melting point, solubility, partition coefficient, dissolution, membrane permeability, dissociation constants, and drug stability.

Conclusions:

  • Developing a successful drug formulation involves intricate considerations of the drug, excipients, patient compliance, storage, and stability.
  • Patient-centered factors such as taste, appearance, and palatability are crucial for successful pediatric drug development.