Opioid overdose antidote is the latest drug with a huge price hike

Per Vox, makers of an anti-opioid drug called naloxone are jacking prices in the face of the nation's opioid and heroin epidemic. The lesson, Vox says, is that they're doing it because they can — America's free market on pharmaceutical pricing lets drugmakers set their own prices with private insurers without any government interference.

• Auto-injection version: $690 in 2014; $4,500 today
• Injectable version: $62.29 in 2012; $142.49 today

Why it matters: Drug companies can't afford more stories like this right when they're getting President Trump to soften his tone on rising prices.