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Dosage Regimen: Fixed Dose01:01

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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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Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are...
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Drug delivery methods like oral inhalation, nasal sprays, transdermal patches, eye drops, intravitreal injection,  and rectal administration provide localized effects with reduced toxicity.
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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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The enteral drug administration involves three primary routes: oral, sublingual, and buccal. Oral ingestion is the most prevalent, safe, economical, and convenient method for drug administration. However, it has certain drawbacks, including limited absorption due to the drug's low water solubility or poor membrane permeability, possible emesis from GI mucosa irritation, destruction of drugs by digestive enzymes or low gastric pH, and irregular absorption along with food or other drugs.
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Revolutionizing fixed-dose combinations with long-acting microsphere.

Zhenhua Hu1, Xiao Xiao2, Guiyun Zhang2

  • 1Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China.

European Journal of Pharmaceutical Sciences : Official Journal of the European Federation for Pharmaceutical Sciences
|February 6, 2025
PubMed
Summary

Long-acting fixed-dose combinations (FDCs) are needed to improve patient adherence. Microsphere technology offers a promising approach for developing these sustained-release FDCs, enhancing therapeutic outcomes.

Keywords:
Chronic diseaseFixed-dose combinationsLong-actingMicrosphere

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Area of Science:

  • Pharmacology
  • Drug Delivery Systems
  • Biotechnology

Background:

  • Combination therapy is vital for managing complex diseases.
  • Fixed-Dose Combinations (FDCs) enhance therapeutic outcomes but often require frequent dosing.
  • Conventional FDCs lead to poor patient compliance and inconsistent treatment, especially in chronic conditions.

Purpose of the Study:

  • To highlight the demand for long-acting FDCs.
  • To emphasize sustained drug release and reduced dosing frequency.
  • To improve patient adherence and therapeutic outcomes.

Main Methods:

  • Review of current literature on FDCs and drug delivery systems.
  • Focus on microsphere technology for encapsulating multiple medications.
  • Analysis of sustained release patterns and patient compliance factors.

Main Results:

  • Long-acting FDCs are increasingly demanded for chronic disease management.
  • Microsphere technology enables precise encapsulation and controlled release of multiple drugs.
  • Sustained release reduces dosing frequency, potentially improving adherence.

Conclusions:

  • Microsphere technology is a promising approach for developing advanced long-acting FDCs.
  • This technology can revolutionize FDC therapy by enhancing efficacy and patient compliance.
  • Further research into microsphere-based FDCs is warranted for improved patient care.