Related Experiment Video

Updated: Oct 13, 2026

Antimicrobial Synergy Testing by the Inkjet Printer-assisted Automated Checkerboard Array and the Manual Time-kill Method
12:03

Antimicrobial Synergy Testing by the Inkjet Printer-assisted Automated Checkerboard Array and the Manual Time-kill Method

Published on: April 18, 2019

[Interactions between antibiotics (author's transl)]

H Ata

    Mikrobiyoloji Bulteni
    |January 1, 1980
    PubMed

    Insights

    Combined antibiotic therapy is often used for broader coverage due to rising antibiotic resistance. However, this approach can lead to negative effects and should be carefully considered based on infection type and drug interactions.

    Area of Science:

    • Microbiology and Infectious Diseases
    • Pharmacology
    • Clinical Medicine

    Context:

    • Increasing antibiotic resistance necessitates exploring alternative treatment strategies.
    • Combined antibiotic therapy is frequently employed to broaden antibacterial spectrum.
    • Concerns exist regarding the efficacy and safety of empirical antibiotic combinations.

    Purpose:

    • To evaluate the rationale and potential consequences of combined antibiotic therapy.
    • To highlight the importance of considering drug interactions and patient factors in antibiotic selection.
    • To emphasize that combination therapy is not always superior to monotherapy.

    Summary:

    • Antibiotic resistance drives the frequent use of combined antibiotic therapy for broader coverage.
    • Potential adverse effects include antagonism, disruption of normal flora, secondary infections, and increased adverse reactions.
    • Clinical outcomes may differ from in vitro findings, necessitating careful consideration of pathogenicity, host defenses, and drug interactions.

    Impact:

    • Informs clinical decision-making regarding antibiotic prescribing practices.
    • Highlights the need for individualized treatment strategies in infectious diseases.
    • Underscores the importance of understanding antibiotic interactions for optimizing patient outcomes and combating resistance.

    More Related Videos

    Quadruple-Checkerboard: A Modification of the Three-Dimensional Checkerboard for Studying Drug Combinations11:15

    Quadruple-Checkerboard: A Modification of the Three-Dimensional Checkerboard for Studying Drug Combinations

    Published on: July 24, 2021

    In Vitro Evaluation of the Potentiating Effects of Plant-Derived Molecules on Conventional Biocides09:21

    In Vitro Evaluation of the Potentiating Effects of Plant-Derived Molecules on Conventional Biocides

    Published on: May 8, 2026

    Related Concept Videos

    Antibiotic Selection01:45

    Antibiotic Selection

    Researchers use antibiotic resistance genes to identify bacteria that possess a plasmid containing their gene of interest. Antibiotic resistance naturally occurs when a spontaneous DNA mutation creates changes in bacterial genes that eliminate antibiotic activity. Bacteria can share these new resistance genes with their offspring and other bacteria. The overuse and misuse of antibiotics have created a public health crisis, as resistant and multi-resistant bacteria continue to develop.Antibiotic...
    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...
    Factors Affecting Protein-Drug Binding: Drug Interactions01:23

    Factors Affecting Protein-Drug Binding: Drug Interactions

    Drug interactions are a critical aspect of pharmacology and can occur when two or more drugs compete for the same binding site. This competition can result in one drug displacing another, altering the effect of the displaced drug. Drug interactions are complex processes that rely heavily on how much of the displacer drug is present and how strongly it can bind to the same sites as the displaced drug.
    Displacement interactions can have varying outcomes, ranging from toxicity to virtually...
    Pharmacokinetics: Drug–Drug Interactions01:25

    Pharmacokinetics: Drug–Drug Interactions

    Drug interactions occur when the pharmacological effect of one drug is altered by another substance, either enhancing or diminishing its activity. The drug whose activity is altered is known as the object drug, and the substance causing the alteration is called the agent drug or the precipitant. The net effects of these interactions are mostly undesirable, leading to decreased effectiveness or increased adverse effects. In rare cases, interactions can be beneficial, such as the enhanced...
    Pharmacokinetics: Drug–Food and Drug–Viral Interactions01:26

    Pharmacokinetics: Drug–Food and Drug–Viral Interactions

    A drug interaction occurs when the concurrent use of another drug, food, or an external substance alters the pharmacological activity of a drug. This interaction can modify the action of the original drug, affecting its effectiveness and safety.Drug–food interactions are significant as they impact drug absorption, metabolism, and excretion. For example, grapefruit juice is a well-known disruptor of drug metabolism. It inhibits the cytochrome P450 3A4 enzyme, crucial for the metabolism of many...
    Inhibitors of Bacterial Protein Synthesis01:25

    Inhibitors of Bacterial Protein Synthesis

    Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...