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Ocular adverse effects associated with systemic medications : recognition and management
Ricardo M Santaella1, Frederick W Fraunfelder
1Casey Eye Institute, Oregon Health & Science University, Portland, OR 97201, USA.
Abstract:
This article reviews several retrospective case series and reported adverse events regarding common ocular adverse effects related to systemic therapy. It is not intended as a comprehensive summary of these well described adverse drug reactions, nor is it intended to cover the complete spectrum of all ocular adverse effects of systemic therapy. Many systemic drugs may produce ocular toxicity, including bisphosphonates, topiramate, vigabatrin, isotretinoin and other retinoids, amiodarone, ethambutol, chloroquine and hydroxychloroquine, tamoxifen, quetiapine, cyclo-oxygenase (COX)-2 inhibitors, erectile dysfunction agents and some herbal medications. For this review, the certainty of the adverse effect profile of each medication was evaluated according to the WHO Causality Assessment Guide.A certain relationship has been established for pamidronate and alendronate as causes of scleritis, uveitis, conjunctivitis and blurred vision. Topiramate has been established as adversely causing symptoms consistent with acute angle-closure glaucoma, typically bilateral. Vigabatrin has been shown to cause bilateral irreversible visual field defects attributed to underlying medication-induced retinal pathology. Isotretinoin should be considered in the differential diagnosis of any patient with pseudotumour cerebri. Patients taking amiodarone and hydroxychloroquine should be monitored and screened regularly for development of optic neuropathy and maculopathy, respectively. Sildenafil has been reported to cause several changes in visual perception and is a possible, not yet certain, cause of anterior ischaemic optic neuropathy. Patients taking tamoxifen should also be monitored for development of dose-dependent maculopathy and decreased colour vision. COX-2 inhibitors should be included in the differential diagnosis of reversible conjunctivitis. Several herbal medications including canthaxanthine, chamomile, datura, Echinacea purpurea, Ginkgo biloba and liquorice have also been associated with several ocular adverse effects. It is the role of all healthcare professionals to detect, treat and educate the public about adverse reactions to medications as they are an important health problem.
Insights
Systemic medications can cause various ocular adverse effects, including glaucoma, visual field defects, and vision changes. Healthcare professionals must detect and manage these drug-induced eye problems.
Area of Science:
- Ophthalmology
- Pharmacology
- Toxicology
Background:
- Systemic medications are frequently associated with ocular adverse effects.
- Understanding these drug-induced ocular toxicities is crucial for patient safety.
- Existing literature highlights numerous medications with potential ocular side effects.
Purpose of the Study:
- To review common ocular adverse effects linked to systemic therapies.
- To evaluate the certainty of adverse effect profiles using the WHO Causality Assessment Guide.
- To inform healthcare professionals about drug-related eye conditions.
Main Methods:
- Review of retrospective case series and reported adverse events.
- Evaluation of medication certainty using the WHO Causality Assessment Guide.
- Identification of specific drugs and their associated ocular toxicities.
Main Results:
- Certainty established for bisphosphonates (pamidronate, alendronate) causing scleritis, uveitis, and blurred vision.
- Topiramate linked to acute angle-closure glaucoma; vigabatrin to irreversible visual field defects.
- Isotretinoin associated with pseudotumor cerebri; amiodarone with optic neuropathy; hydroxychloroquine with maculopathy.
- Sildenafil may cause visual perception changes and anterior ischemic optic neuropathy.
- Tamoxifen linked to dose-dependent maculopathy; COX-2 inhibitors to reversible conjunctivitis.
- Herbal medications like Ginkgo biloba and Echinacea also associated with ocular effects.
Conclusions:
- Numerous systemic drugs, including bisphosphonates, topiramate, vigabatrin, isotretinoin, amiodarone, hydroxychloroquine, sildenafil, tamoxifen, COX-2 inhibitors, and herbal remedies, can cause significant ocular adverse effects.
- Healthcare professionals play a vital role in detecting, treating, and educating patients about these medication-induced eye conditions.
- Regular monitoring and screening are essential for patients on specific systemic therapies known to cause ocular toxicity.
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