Really?
Antibiotics, painkillers, anesthetic, vaccines, anitvirals, chemo therapy, insulin.........
I would have no issue in investing in drug companies.
I'd recommend some further reading or, if that's too much effort, watch a few investigative documentaries on the corrupt connections and influences between drug companies and health care organisations, including the NHS and, guess what, even cancer organisations and diabetes organisations.
There is overwhelming evidence that none of it is in the interest of "curing" or even "treating" medical disorders. It is all in the interest of promoting their own products or that of connected affiliates for the purpose of capitalism. For instance, this forum is sponsored (funded) by Janssen pharmaceutical, a subsidy of Johnson and johnson - who have been convicted of felony fraudulent marketing and bribery in the USA and been sued in class action suits for a drug they produced called Risperidone. They paid out over 3$ billion and the last suit in Philladelphia cost them 7$ million. Take a look also into the connections between drug companies and the meat and dairy industries - note how even this forum promotes foods which are actually counter effective to diabetes eg processed food and meat. Because antibiotics are sold and used in those industries to produce greater volumes of meat in a shortened space of time, once again we see self interest and not interest in well being of human kind, or even the environment or animal welfare for that matter.
So many ailments can be prevented and treated purely by a healthier diet and lifestyle. But people don't do this. They buy into the psychiatric industries, which is just about drug peddling and not about curing or preventing anything. I say this from first hand experience and from knowing others in care and health care industries who have seen drugs being used just to sedate and shut up people in the system, not to help them get better.
So rather than blindly say you would happily sponsor drug companies because you believe that they help treat people, I would recommend doing a bit of research and digging deep before making that decision. I'm sure there are probably some companies who do genuinely help treat people's conditions but unfortunately those are few and far between. I'm not being critical by the way, just raising awareness.