They're all campaigning on this

It's both. State laws rule health regulations on prescriptions and what Doctors are required to disclose to patients along with laws that protect doctors and pharmicutal companies at a state level, then you have the federal government with rules and regulations and laws that are set in place to protect consumers, doctors and pharmicutal companies. The problem is that no state really follows the federal laws and guidelines when someone is hurt because the companies are always bigger than a injured person. Then the fed allows these products and medical procedures to be approved. States should have no pull if the fed approved a dangerous defective medical treatment, but they say it's never the companies fault because the doctor should have known. .. how could a doctor know if the company didn't inform them?

Sorry but the 9th and 10th amendments make it clear that anything not listed in the constitution is for the states and the people.
I don't recall any part of the constitution that mentions health.

We have to have a federal government that can protect people from the state government because both have their own constitutions. I guess we are no living in a anything goes if your rich type of environment. God forbid your a little ant that gets squished by the big corporation.

The federal constitution is the highest law of the land. The 9th and 10th amendments are part of the federal constitution. State constitutions can't conflict with the federal constitution.
This is why they need to teach civics in class. People don't even know the basics anymore.

We have a issue today in the states that have voted to rewrite their constitution contrary to the federal constitution that the states should abide by.

Yep, and when that hits the Supreme Court they'll be struck down as unenforceable. That's our government working as designed.