Regulation of drugs has caused deaths due to high cost of compliance with FDA regulations meaning far fewer drugs get developed that may save lives.

https://www.amazon.com/Regulation-Pharmaceutical-Innovation-...

https://www.amazon.com/Overdose-Government-Regulation-Pharma...

Aviation engines still use leaded gas for general aviation due to regulations that make it impractical to redesign the engines.

https://www.nbcnews.com/business/business-news/leaded-gas-wa...

For more information, google "why do cessna engines still use leaded gas?"