(those are very old numbers, btw. Prolly double now.)
At each step, about 50% attrition.
(This is why press releases finding something active #InMice is so silly.)
So it COSTS $620 million to find a new drug if everything works.
How much do pharma companies actually SPEND to find a new drug?
(So include failure costs)
Turns out about $8B per drug.
(Reported R&D costs per new drug approval)