It's impossible to be an expert in every field, particularly those as complicated as medicine. Furthermore, you don't have to rely on authority, I linked to an RCT showing it was ineffective.
"Not particularly profitable", which is speculative, is still profitable. I highly doubt any one at Merck is actively working against selling a drug they already manufacture at a profit, but feel free to provide evidence otherwise.
"Not particularly profitable", which is speculative, is still profitable. I highly doubt any one at Merck is actively working against selling a drug they already manufacture at a profit, but feel free to provide evidence otherwise.