Flaccid paralysis resulting from<unk>  can be distinguished from myasthenia gravis by the use of the drug edrophonium, which worsens the paralysis caused by<unk> , but strengthens the muscle in the case of myasthenia gravis. (Edrophonium is an cholinesterase inhibitor hence increases the concentration of acetylcholine present).
Myasthenic<unk> 
Respiratory failure is feared complication
Much more common
Due to medication non-adherence, infection, surgery, tapering of immunosuppressants, meds<unk> 
Excessive anticholinesterase medication may cause weakness and<unk>  symptoms
Rarely if ever seen with dose limitation of pyridostigmine to less than 120mg q3hr
If on usual dose of meds assume exacerbation due to MG even with<unk>  side effects
Edrophonium (Tensilon) test to distinguish the two is controversial
Give 1-2mg IV slow push. If any fasciculations, respiratory depression, or<unk>  symptoms within a few minutes, problem is likely<unk>  (no more edrophonium). If no evidence of<unk>  excess, give total of 10mg and observe improvement in case of myasthenic<unk> .
Side effects of Edrophonium: Arrhythmias, Hypotension, Bronchospasm
Thus, need to be on a monitor, with atropine on hand
Treatment: Atropine
Respiratory failure is feared complication
Much more common
Due to medication non-adherence, infection, surgery, tapering of immunosuppressants, meds
Excessive anticholinesterase medication may cause weakness and<unk>  symptoms
Rarely if ever seen with dose limitation of pyridostigmine to less than 120mg q3hr
If on usual dose of meds assume exacerbation due to MG even with<unk>  side effects
Give 1-2mg IV slow push. If any fasciculations, respiratory depression, or<unk>  symptoms within a few minutes, problem is likely<unk>  (no more edrophonium). If no evidence of<unk>  excess, give total of 10mg and observe improvement in case of myasthenic<unk> .
Side effects of Edrophonium: Arrhythmias, Hypotension, Bronchospasm
Thus, need to be on a monitor, with atropine on hand
Treatment: Atropine
Cholinergic crisis
Carbamate toxicity
Heat stroke
Mushroom toxicity, especially:
Neurogenic shock
Amanita muscaria
Serotonin syndrome
Inocybe