The drug industry has for a long time claimed the cost is close to $1 billion.
Former NEJM editor Marcia Angell in her book "The truth about the drug companies" claimed the real cost was $100 million.
Now an unlikely source chimes in, in an interview in Realtid. Lennart Forslund is an expert from the Swedish FDA and in a very frank interview he claims "researching drugs is expensive as hell."
His price tag--SEK 1 billion, or about $150 million.