http://khn.org/news/candidates-decry-high-drug-prices-but-they-have-few-options-for-voters/?utm_campaign=KHN%3A+Daily+Health+Policy+Report&utm_source=hs_email&utm_medium=email&utm_content=34504530&_hsenc=p2ANqtz-8jV9oGDFPhUY7AIC7h75jL1KC5hMbGnVXQiBbMw7S-o8a9cNbtaq7e7EyhVHZrYWAX2-Oix7Ha5jcF9E7NZ2gAl0hFHg&_hsmi=34504530

In this year’s presidential campaign, health care has taken a back seat. But one issue appears to be breaking through: the rising cost of prescription drugs.

The blockbuster drugs to treat hepatitis C as well as dramatic price increases on older drugs, most recently the EpiPen allergy treatment, have combined to put the issue back on the front burner.

Democrat Hillary Clinton just issued a lengthy proposal to address what her campaign calls “unjustified price hikes for long-available drugs.” That’s in addition to a broader proposal to address high drug prices the campaign put out last fall.

Republican Donald Trump, meanwhile, has said little about health care since announcing his candidacy in 2015, but he has several times called for a change in law to allowMedicare to negotiate drug prices for the population it serves.

Here are five reasons why this issue is back — and why it is so difficult to solve.