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Published on: July 23, 2016
Ocular toxicity associated with systemic drug therapy
1Indiana University School of Medicine, Indianapolis, USA.
Abstract:
Systemic drug-induced ocular side effects are increasing because of the vast numbers of new drugs being introduced. Reports of drug-induced ocular toxicity must be well documented, and other causes of these side effects must be ruled out to help establish causality. We reviewed the most recent reports of the most commonly used and newest systemic drugs that have been implicated in ocular toxicity. Using toxicologic criteria needed to establish causality, data from reports of ocular toxicity associated with systemic cidofovir (Vistide), sildenafil (Viagra), vigabatrin (Sabril), tamoxifen (Nolvadex), hydroxychloroquine (Plaquenil)/chloroquine (Aralen), amiodarone (Cordarone), and lovastatin (Mevacor)/simvastatin (Zocor) were evaluated and summarized. The probability for causality was determined to be high for all these drugs except for vigabatrin and lovastatin/simvastatin. Methods for detecting, preventing, and treating ocular toxic reactions were then reviewed for each drug.
Insights
Systemic drugs can cause eye side effects. A review found high causality for ocular toxicity with several common drugs, excluding vigabatrin and statins.
Area of Science:
- Ophthalmology
- Pharmacology
- Toxicology
Background:
- The incidence of systemic drug-induced ocular side effects is rising due to new drug development.
- Accurate documentation and exclusion of alternative causes are crucial for establishing causality in drug-induced ocular toxicity.
- Systemic medications are increasingly associated with adverse ocular events.
Purpose of the Study:
- To evaluate the causality of ocular toxicity for commonly used and newly introduced systemic drugs.
- To review recent reports implicating systemic drugs in ocular toxicity.
- To summarize detection, prevention, and treatment strategies for drug-induced ocular reactions.
Main Methods:
- Systematic review of recent literature on ocular toxicity associated with systemic drugs.
- Application of toxicologic criteria to establish causality for drug-induced ocular side effects.
- Evaluation of ocular toxicity reports for specific systemic agents including cidofovir, sildenafil, vigabatrin, tamoxifen, hydroxychloroquine/chloroquine, amiodarone, and statins.
Main Results:
- High probability of causality for ocular toxicity was established for cidofovir, sildenafil, tamoxifen, hydroxychloroquine/chloroquine, and amiodarone.
- Vigabatrin and lovastatin/simvastatin showed a lower probability of causality for ocular toxicity based on the evaluated criteria.
- The review identified specific ocular toxicities linked to each evaluated drug.
Conclusions:
- Several commonly prescribed systemic drugs carry a high risk of causing ocular toxicity.
- Vigabatrin and statins (lovastatin/simvastatin) were less likely to be causative agents for ocular toxicity in this review.
- Understanding these risks is vital for clinicians to manage and prevent adverse ocular events in patients on systemic medications.
Related Concept Videos
Drug Toxicity: Overview
Drug Toxicity: Risk factors
Drug Toxicity: Dose-Dependent Reactions
Drug Toxicity: Allergic Reactions
Drug toxicity: Idiosyncratic Reactions
Drug toxicity: Drug–Drug Interaction

