Ocular Pharm Flashcards Preview

Neurology > Ocular Pharm > Flashcards

Flashcards in Ocular Pharm Deck (19)
Loading flashcards...
1
Q

SNS to the eye

A

travels along arteries from the superior cervical ganglion. Causes mydriasis (pupil dilation via alpha 1 receptor) and ciliary relaxation for far vision (beta 2 receptor)

2
Q

PSNS to the eye

A

Cholinergic; Travel with CN III from EW nucleus. Causes Miosis (M3 receptor)

3
Q

SNS agonist on the pupils

A

dilation (mydriasis)

4
Q

PSNS agonist on pupils

A

constriction

5
Q

Opiates on pupils

A

constant constriction by blocking the inhibitory interneurons of the EW nucleus

6
Q

Muscarinic Antagonists function?

A

Well, we know that PSNS uses muscarinic (M3) receptors to cause pupillary constriction (miosis) and cilliary muscle contraction (accomodation to see close), so blocking those muscarinic receptors would cause dilation and ciliary muscle relaxation.

Used in the tx of iritis and uveitis and in eye exams

7
Q

AE of muscarinic agonists

A

stinging and increased intra-ocular pressure,

If systematized they may cause anti-sludgeBBB

8
Q

What are the two muscarinic antagonists we need to know

A

atropine and scopolamine

9
Q

What is glaucoma

A

essentially it is increased intraocular pressure from making too much aqueous humor or not draining it. Caused by lots of drugs.

10
Q

Open angle galucoma tx involves

A

lowering aqueous humor production or raising aqueous outflow.

11
Q

Latanoprost and Bimatoprost

A

Prostaglandin analogs- tx for open angle glaucoma, MOA really unknown though it may increase outflow.

PRODRUG with in situ hydrolysis

AE: blurred vision, stinging, itching
Long term may cause brown pigmentation of the iris, lid, and lashes. May also cause excessive eyelash growth hypertrichosis

12
Q

Timolol, carteolol

A

Beta Blockers- Block the ciliary body production of aqueous by lowering cAMP or lowereing ocular blood flow. Work rapidly

13
Q

Carbonic Anhydrase Inhs are

A

Dorzolamide and Brinzolamide- They block the production of water and Co2 from carbonic acid. Less water means less aqueous humor

14
Q

Two AEs to KNOW for carbonic anhydrase inhs

A

1) Taste Disturbances arise from their inhibition of CA in the oral cavity
2) These are sulfonamides and carry the risk of severe adverse outcomes

See a question with these AES think DORZOLAMIDE

15
Q

Muscarinic agonists cause what

A

Miosis and accomodation.., Also cause increased flow of aqueous humor so they used to be the drug of choice for glaucoma. No mas

16
Q

Muscarinic agonists we need to know

A

carbachol and pilocarpine

17
Q

Acetylcholinesterase inhs

A

more potent an dlonger acting than the direct muscarinic agonists

NOTE THAT YOU CAN”T USE THEM WITH CARBAMATE PHOSPHATE INSECTICIDES because they also inhibit AchE.

Also contra in closed angle glaucoma….may make it worse

18
Q

What is the Ache we need to know

A

Echothipate

19
Q

Sympathomimetics used when

A
  • to increase aqueous outflow in glaucoma, to cause dilation, and as decongestants