Ocular Side Effects of Sympathomimetics
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Questions and Answers

What is the most common ocular side effect of Direct Sympathomimetics, such as Phenylephrine?

  • Lacrimation (correct)
  • Iris pigment drop out
  • Conjunctival hyperemia
  • Pupillary cysts

What is the percentage of patients who experience a rise in blood pressure with Direct Sympathomimetics, such as Phenylephrine?

  • 5%
  • 15%
  • 20%
  • 10% (correct)

What is the contraindication for Direct Sympathomimetics, such as Phenylephrine, in patients with a history of hyper-reaction?

  • Malignant hypertension
  • Hypertension
  • Parkinson's disease
  • Idiopathic hypotension (correct)

What is the mechanism of action of Direct Sympathomimetics, such as Phenylephrine, on conjunctival and iris vasculature?

<p>Vasoconstriction and blood flow reduction (A)</p> Signup and view all the answers

What is the interaction between Direct Sympathomimetics, such as Phenylephrine, and Tricyclic antidepressants?

<p>Enhanced cardiovascular effect (C)</p> Signup and view all the answers

What is the clinical use of Direct Sympathomimetics, such as Phenylephrine, in patients with narrow angles?

<p>Caution in patients with narrow angles (C)</p> Signup and view all the answers

What is the approximate reduction in IOP caused by ophthalmic beta blockers?

<p>20-22% (A)</p> Signup and view all the answers

Which of the following is a cardio-selective ophthalmic beta blocker?

<p>Betaxolol (B)</p> Signup and view all the answers

What is the washout period for Timolol Maleate?

<p>1-2 months (C)</p> Signup and view all the answers

Which of the following is a hydrosoluble substance?

<p>Carteolol (D)</p> Signup and view all the answers

What is the maximum effect of Timolol Maleate achieved in?

<p>3 weeks (C)</p> Signup and view all the answers

What is a unique feature of Carteolol?

<p>Increases the ratio of high density lipids to total cholesterol (D)</p> Signup and view all the answers

What is a critical evaluation of the cocaine test in the diagnosis of Horner's syndrome?

<p>Measuring the postcocaine anisocoria provides a better prediction of Horner's syndrome than calculating the net change in anisocoria. (D)</p> Signup and view all the answers

What is the indicative value of postcocaine anisocoria for Horner's syndrome?

<p>0.8 mm (C)</p> Signup and view all the answers

What is the purpose of 1% hydroxyamphetamine dilation in the diagnosis of Horner's syndrome?

<p>To diagnose 1st or 2nd order neuron Horner's syndrome (A)</p> Signup and view all the answers

What is the effect of 10% cocaine instillation on a mitotic pupil?

<p>Normal dilation (A)</p> Signup and view all the answers

What is the mechanism of direct sympathomimetics like methyldopa?

<p>Alpha 1 agonist (D)</p> Signup and view all the answers

What is the class of antidepressants that interacts with monoamine oxidase inhibitors?

<p>Tricyclic (A)</p> Signup and view all the answers

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