Related Experiment Video

Updated: Aug 23, 2026

Intracameral Injection in Rats with Low Risk of Adverse Effects
06:19

Intracameral Injection in Rats with Low Risk of Adverse Effects

Published on: May 31, 2024

[Antimicrobial agents in eyedrops]

Z Sklubalová1

  • 1Katedra farmaceutické technologie Farmaceutické fakulty Univerzity Karlovy, Hradec Králové. sklubalo@faf.cuni.cz

Ceska a Slovenska Farmacie : Casopis Ceske Farmaceuticke Spolecnosti a Slovenske Farmaceuticke Spolecnosti
|June 29, 2004
PubMed

Insights

Ophthalmic drops require antimicrobial agents to prevent contamination, but these agents can harm eye tissues. This review examines antimicrobial properties, efficacy, and toxicity for safer eye drop formulations.

Area of Science:

  • Pharmaceutical Microbiology
  • Ophthalmology
  • Drug Formulation

Context:

  • Microbial contamination of ophthalmic preparations poses a significant risk of severe ocular injury.
  • Sterility is a critical requirement for all ophthalmic drops to ensure patient safety.
  • Multidose ophthalmic products require antimicrobial agents to prevent secondary microbial contamination.

Purpose:

  • To summarize pharmacopoeial standards for the microbial quality of ophthalmic drops.
  • To review the properties, efficacy, and typical concentrations of common antimicrobial agents used in ophthalmic solutions.
  • To discuss the toxicity and ocular side effects associated with these antimicrobial agents and explore alternatives.

Summary:

  • The paper details pharmacopoeial requirements for ophthalmic drop sterility.
  • It outlines key antimicrobial agents (e.g., benzalkonium chloride, parabens) used in eye drops, their characteristics, concentrations, and interactions.
  • The review also covers the toxicological profiles and adverse effects of these preservatives on ocular tissues.

Impact:

  • Informs the selection of appropriate antimicrobial agents for ophthalmic formulations to balance efficacy and ocular safety.
  • Highlights the need for careful consideration of preservative toxicity and potential side effects in eye drop development.
  • Guides the development of safer ophthalmic products by exploring alternative preservation strategies.

More Related Videos

In Vivo Confocal Microscopy in the Diagnosis and Management of Dry Eye: A Focus on Imaging Protocols and Interpretation08:13

In Vivo Confocal Microscopy in the Diagnosis and Management of Dry Eye: A Focus on Imaging Protocols and Interpretation

Published on: November 11, 2025

Ultrasound Cyclo Plasty in Eyes with Glaucoma05:05

Ultrasound Cyclo Plasty in Eyes with Glaucoma

Published on: January 26, 2018

Related Concept Videos

Antimicrobial Effectiveness01:28

Antimicrobial Effectiveness

The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
Chemical Agents for Microbial Control01:27

Chemical Agents for Microbial Control

Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
Microbiome of the Eye01:22

Microbiome of the Eye

The human eye has a specialized microbiota that reflects its unique anatomical and immunological environment. This low-biomass microbial community predominantly colonizes the conjunctiva and eyelid margins, playing a vital role in ocular surface homeostasis and defense. Despite its proximity to the richly colonized facial skin, the ocular surface maintains a distinct microbial profile due to continuous mechanical and biochemical defense mechanisms.The conjunctival surface hosts fewer microbial...
Hand hygiene01:23

Hand hygiene

Asepsis is the practice of preventing or breaking the chain of infection. The nurse employs aseptic techniques to prevent the spread of microorganisms and reduce the risk of diseases. Hand hygiene is the cornerstone of aseptic techniques and is classified into medical and surgical asepsis. Medical asepsis includes hand hygiene and the use of gloves. Surgical asepsis, or the sterile technique, refers to practices that render and keep objects and areas free of microorganisms.
Hand washing...
Ophthalmic Drug Delivery Systems01:23

Ophthalmic Drug Delivery Systems

Ophthalmic drug delivery faces major limitations due to poor absorption across the corneal membrane. This process is primarily driven by diffusion and is influenced by two main factors: the physicochemical properties of the drug and tear drainage. Most ophthalmic drugs, such as pilocarpine, epinephrine, atropine, and local anesthetics, are weak bases. They are typically formulated at an acidic pH to enhance chemical stability. However, this leads to high ionization, reducing their ability to...
Antifungal Agents01:15

Antifungal Agents

Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to cholesterol contributes to...