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Related Concept Videos

Combination Therapies and Personalized Medicine02:50

Combination Therapies and Personalized Medicine

Combining two or more treatment methods increases the life span of cancer patients while reducing damage to vital organs or tissue from the overuse of a single treatment. Combination therapy also targets different cancer-inducing pathways, thus reducing the chances of developing resistance to treatment.
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
Combination Therapies and Personalized Medicine02:50

Combination Therapies and Personalized Medicine

Combining two or more treatment methods increases the life span of cancer patients while reducing damage to vital organs or tissue from the overuse of a single treatment. Combination therapy also targets different cancer-inducing pathways, thus reducing the chances of developing resistance to treatment.
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
Dosage Regimens: Designs and Approaches01:28

Dosage Regimens: Designs and Approaches

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...
Drug Dosage Regimen: Overview01:15

Drug Dosage Regimen: Overview

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.
Typically, the starting dose and dosing interval are guided by the manufacturer's recommendations based on clinical trials conducted during and after drug...
Combined Effects of Drugs: Synergism01:27

Combined Effects of Drugs: Synergism

Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Determination of Multiple Dosing Parameters: Loading and Maintenance Doses01:25

Determination of Multiple Dosing Parameters: Loading and Maintenance Doses

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: Jul 11, 2026

Sample Extraction and Simultaneous Chromatographic Quantitation of Doxorubicin and Mitomycin C Following Drug Combination Delivery in Nanoparticles to Tumor-bearing Mice
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Sample Extraction and Simultaneous Chromatographic Quantitation of Doxorubicin and Mitomycin C Following Drug Combination Delivery in Nanoparticles to Tumor-bearing Mice

Published on: October 5, 2017

Optimizing combination chemotherapy by controlling drug ratios.

Lawrence D Mayer1, Andrew S Janoff

  • 1Celator Pharmaceuticals, 1779 West Seventy-fifth Avenue, Vancouver BC V6P 6P2. lmayer@celatorpharma.com

Molecular Interventions
|September 11, 2007
PubMed
Summary

Optimizing cancer chemotherapy involves precise drug ratios. Nanotechnology enables controlled delivery of synergistic drug combinations, improving treatment efficacy and reducing toxicity for various diseases.

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Area of Science:

  • Oncology
  • Nanomedicine
  • Pharmacology

Background:

  • Standard chemotherapy often maximizes individual drug doses, risking toxicity without guaranteeing optimal efficacy.
  • Drug interactions can be synergistic or antagonistic depending on their ratios, suggesting lower doses may be more effective.
  • Traditional combination therapies struggle to maintain specific drug ratios in vivo.

Purpose of the Study:

  • To explore the potential of a ratiometric approach in combination chemotherapy.
  • To leverage advances in nanotechnology for controlled drug delivery.
  • To enhance the efficacy of anticancer treatments by exploiting synergistic drug ratios.

Main Methods:

  • Utilizing nano-scale drug delivery vehicles for precise drug ratio control.
  • Translating in vitro synergistic drug ratio data into in vivo therapeutic strategies.
  • Developing methods to maintain controlled drug ratios post-administration.

Main Results:

  • Demonstrated the feasibility of using nanotechnology to control drug ratios in combination therapy.
  • Showcased the potential for synergistic drug interactions to be effectively exploited.
  • Indicated that precise ratio control can overcome antagonistic effects seen with conventional dosing.

Conclusions:

  • A ratiometric approach to combination chemotherapy, enabled by nanodelivery systems, offers a novel strategy.
  • This method can improve the effectiveness of existing and future cancer treatments.
  • Exploiting synergistic drug ratios holds promise for enhancing therapeutic outcomes across diseases.