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Related Concept Videos

Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
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Glaucoma: Overview01:25

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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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Angle Closure Glaucoma: Treatment01:28

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Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
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Direct-Acting Cholinergic Agonists: Pharmacological Actions00:59

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Direct-acting cholinergic agonists exert their pharmacological actions by mimicking the effects of acetylcholine on postsynaptic muscarinic receptors to generate parasympathetic responses. These agents elicit a range of physiological responses, including cardiovascular effects. For example, activation of muscarinic receptors induces bradycardia, decreased cardiac output, reduced peripheral resistance, and consequent hypotension. In the eye, stimulation of M3 receptors leads to smooth muscle...
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As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
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Antimuscarinic drugs block muscarinic receptors in multiple systems, including the gut, eye, smooth muscles, respiratory tract, cardiovascular, and central nervous systems. They produce similar effects with varying selectivity depending on the specific agent and tissue. Here are the key pharmacological actions of antimuscarinics:
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Related Experiment Video

Updated: Oct 23, 2025

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Systemic side effects of glaucoma medications.

Amirmohsen Arbabi1, Xuan Bao2, Wesam Shamseldin Shalaby1,3

  • 1Glaucoma Research Center, Wills Eye Hospital, Philadelphia, Pennsylvania, USA.

Clinical & Experimental Optometry
|August 17, 2021
PubMed
Summary

Glaucoma medications, while vital for lowering eye pressure, can cause systemic side effects. This review details adverse effects of common glaucoma drugs, especially in vulnerable patient groups.

Keywords:
Glaucomaglaucoma medicationspaediatric patientspregnancy and lactationsystemic side effects

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Area of Science:

  • Ophthalmology
  • Pharmacology

Background:

  • Glaucoma is a leading cause of irreversible blindness.
  • Retinal ganglion cell loss and visual field deficits characterize glaucoma.
  • Lowering intraocular pressure (IOP) is the primary treatment strategy.

Purpose of the Study:

  • To review the systemic adverse effects of various glaucoma medications.
  • To highlight specific concerns for pregnant patients, breastfeeding mothers, and children.

Main Methods:

  • Literature review of systemic side effects of glaucoma pharmacotherapies.
  • Analysis of drug mechanisms targeting adrenergic, cholinergic, and prostaglandin receptors.
  • Focus on specific drug classes: carbonic anhydrase inhibitors, sympathomimetics, parasympathomimetics, beta blockers, prostaglandin analogs, and hyperosmotic agents.

Main Results:

  • Glaucoma medications, acting on systemic receptors, can cause extraocular adverse effects.
  • Systemic side effects vary by drug class and patient population.
  • Special considerations are needed for pregnant, breastfeeding, and pediatric patients.

Conclusions:

  • Understanding systemic adverse effects is crucial for safe glaucoma management.
  • Individualized treatment plans are necessary, especially in special populations.
  • Further research into safer glaucoma pharmacotherapies is warranted.