Switzerland's pharmaceutical industry profited from testing unlicensed products on far more than 1,000 psychiatric patients until the 1970s, medical historians.
The researchers examined research projects at the Psychiatric Clinic of the University of Basel, the city that is known as a hub for Switzerland's pharmaceutical industry.
Between the 1950s and the 1970s, at least 60 medical substances were tested on patients, the study found.
"The relationship between the clinic and the industry can be seen as a symbiotic barter trade," the historians from Bern University wrote.
While the clinic received free medicines that broadened its options for treating patients, it supplied test results that allowed the pharmaceutical industry to license and market its products.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
Some of the medicines that were tested were never introduced to the market because of their negative side effects.
Although some patients or their families were aware that they were taking part in tests, others likely did not know this or were even forced to test medications against their will, the historians concluded.
In the post-war decades, the clinic did not document these tests according to modern standards, and doctors were still seen as powerful figures, while patients had little say.
"It seems that until the 1970s, the understanding among psychiatrists was that the hospitalisation in a clinic provided legal cover for administering medicines" to that patient, the study said.
The historians sampled 330 patient files, but were not able to access the archives of pharmaceutical companies.
