Hemodialysis is ineffective
Precipitous deterioration is common (esp with verapamil)
Nifedipine can kill a child with a single pill
Onset of<unk>  after overdose is usually seen within the first one to six hours for most CCBs, however verapamil is often more delayed
Nifedipine, Amlodipine, Nicardipine
Systemic vasodilation, mild effect on heart<unk>  = Hypotension, reflex tachycardia
With higher doses of<unk>  peripheral selectivity is lost
I.e. may see decreased inotropy, bradycardia
Systemic vasodilation, mild effect on heart
I.e. may see decreased inotropy, bradycardia
Verapamil, Diltiazem
Stronger effect on heart, weak vasodilators<unk>  = Bradycardia, decreased inotropy, hypotension
Calcium channel blocker toxicity
Cardiac
Tricyclic antidepressant toxicity
Inferior MI 
Clonidine toxicity
Sick sinus syndrome
Beta-blocker toxicity
Neurocardiogenic/reflex-mediated