Medication Management for Glaucoma

Medications Used in the Management of Glaucoma

1. Cholinergics (Miotics)
  • Examples: Pilocarpine, Carbachol (intraocular)
  • Action:
    • Increase aqueous fluid outflow
    • Contract the ciliary muscle
    • Cause miosis (constriction of the pupil)
    • Open trabecular meshwork
  • Side Effects:
    • Periorbital pain
    • Blurry vision
    • Difficulty seeing in the dark
  • Nursing Implications:
    • Caution patients about diminished vision in dimly lit areas.
    • Pilocarpine can be stored at room temperature for up to 8 weeks, then should be discarded.
2. Beta-Blockers
  • Example: Timolol Maleate
  • Action:
    • Decrease aqueous humor production
  • Side Effects:
    • Can have systemic effects such as:
    • Bradycardia
    • Exacerbation of pulmonary disease
    • Hypotension
  • Nursing Implications:
    • Contraindicated in patients with asthma, chronic obstructive pulmonary disease, second- or third-degree heart block, bradycardia, or heart failure.
    • Educate about punctal occlusion to limit systemic effects.
3. Alpha-Adrenergic Agonists
  • Examples: Apraclonidine, Brimonidine
  • Action:
    • Decrease aqueous humor production
  • Side Effects:
    • Eye redness
    • Dry mouth and nasal passages
  • Nursing Implications:
    • Educate patients about the need for punctal occlusion to limit systemic effects.
4. Carbonic Anhydrase Inhibitors
  • Examples: Acetazolamide, Dorzolamide
  • Action:
    • Decrease aqueous humor production
  • Side Effects:
    • Oral medications can lead to serious side effects including:
    • Anaphylactic reactions
    • Electrolyte loss
    • Depression
    • Gastrointestinal upset
    • Impotence
    • Weight loss
    • Topical forms (e.g., Dorzolamide) may cause topical allergy
  • Nursing Implications:
    • Monitor electrolyte levels.
    • Do not administer to patients with sulfa allergies.
5. Prostaglandin Analogues
  • Examples: Latanoprost, Bimatoprost
  • Action:
    • Increase uveoscleral outflow
  • Side Effects:
    • Darkening of the iris
    • Conjunctival redness
    • Possible rash
  • Nursing Implications:
    • Instruct patients to report any side effects.
Summary

These medications are critical in managing glaucoma by either increasing outflow or decreasing production of aqueous humor, impacting patient's vision and systemic health. Effective patient education on side effects and proper usage is essential for optimal treatment outcomes.