President Donald Trump’s promise to impose tariffs on pharmaceutical imports is raising red flags among generic drugmakers and industry experts, who warn that such a move could lead to increased drug shortages and higher prices.

A version of this article first appeared in CNBC's Healthy Returns newsletter, which brings the latest health-care news straight to your inbox. Subscribe here to receive future editions.Pharma's on edge,

President Trump’s threatened tariffs could lead to higher out-of-pocket costs or insurance premiums, depending on whether drugmakers try to pass on the costs.