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Neuromuscular Drugs (Anticholinesterases ↑ ACh in the synaptic cleft …
Neuromuscular Drugs
Anticholinesterases
↑ ACh in the synaptic cleft
Enhance neuromuscular transmission
Pyridostigmine
Neostigmine
Edrophonium
SE
cholinergic
CI
Asthma
Intestinal / urinary obstruction
Edrophonium preferred for the Dx of MG
due to its v. short t½
Pyridostigmine preferred for the Rx of
MG due to long t½
GABAB agonist
Skeletal muscle relaxant
Baclofen
SE
Sedation
↓ tone
Nausea
Urinary disturbance
CI
PUD
Interaction
fx ↑d by TCAs
Rx painful muscle spasms
Don’t withdraw abruptly
hyperthermia
↑ spasticity
Prevents Ca2+ release from
sarcoplasmic reticulum
Skeletal muscle relaxant
Dantrolene
SE
Hepatotoxicity
GI upset
CI
Hepatic impairment
Used to relieve chronic spasticity and in
malignant hyperthermia