Cholinergics Flashcards
Synthetic direct acting cholinergic receptor drugs
Esters of choline:
- Bethanecol
- Carbachol
Natural direct acting cholinergic receptor drugs
- Acetylcholine
- Cholinomimetic alkaloids
- Pilocarpine
- Nicotine
Indirect acting cholinergic receptor drugs
Elevate endogenous levels of ACh through inhibition of cholinesterase
- Donepezil
- Edrophonium
- Neostigmine
- Physostigmine
- Pyridostigmine
- Rivastigmine
- Tacrine
Irreversible cholinergic receptor drugs
- Isoflurophate
Irreversible cholinergic receptor drug OD antidote
- Pralidoxime
Enhanced release of acetylcholine drug
- Guanidine
Miochol major therapeutic use
- Produces rapid, complete miosis for ocular surgery (e.g.,
cataracts, iridectomy)
Carbachol MOA
- Direct-Acting Cholinomimetic Agents
- Synthetic Choline Ester
Carbachol ADR’s
flushing, sweating, cramping, urinary urgency, severe headache
Carbachol contraindications
- Parkinsonism; too much acetylcholine is going to make Parkinson’s worse
- Corneal abrasions, acute iritis
- Precautions necessary in presence of asthma, peptic ulcer, or urinary distress
Bethanechol MOA
- Direct-Acting Cholinomimetic Agents
- Synthetic Choline Ester
- Activates muscarinic receptors: increases GI peristalsis and defecation - ↑ tone of detrusor muscle; stimulates micturition
Bethanechol ADR’s
Sweating, flushing, salivation, abdominal discomfort, nausea, diarrhea, GI pain and cramping
Bethanechol contraindications
peptic ulcer, bronchial asthma, urinary obstruction, parkinsonism
Pilocarpine major therapeutic uses
- Used for open-angle glaucoma, reversal of cycloplegics and mydriatics after eye exam or surgery
- Pilocarpine Ocular Therapeutic System: continuous release form of pilocarpine (20 μg or 40 μg/h) placed into lower conjunctival cul-de-sac. Used primarily for continuous therapy of open-angle glaucoma.
Carbachol major therapeutic uses
- pupillary miosis during surgery
- chronic treatment of open-angle glaucoma
Bethanechol major therapeutic uses
- nonobstructive urinary retention
Pilocarpine MOA
- Natural product
- Cholinomimetic alkaloid
- Direct cholinergic receptor activation produces contraction of ciliary muscle and ciliary body; miosis occurs which ↑s outflow of aqueous humor from the anterior chamber.
Nicotine MOA
- Activates cholinergic receptors in autonomic ganglia, NMJ, adrenal medulla, and brain
- CNS: Stimulates cerebral cortex via locus ceruleus; increases alertness and cognitive performance
- CV: peripheral vasoconstriction, tachycardia, increased BP
- Stimulates limbic system: ↑ ‘reward’ and ‘pleasure’ action