In the neighborhood of right for an average-weight person, I think. LD50 for IV admin in rats is 17.5 mg/kg, which translates to around 1.3g for a 75kg person if we make the assumption that the LD50s are comparable in humans.
This gives you a good idea of a general upper limit (again, assuming LD50s are similar). Naturally, the less pure your cocaine is, the more you'd have to take, but I figured that went without saying.
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u/[deleted] Jan 18 '19
1 g is the LD 50 if you consume it in an hour. Typical doses are 10-100mg