A House Democrat is calling for hearings following a 400 percent hike in the price for EpiPen allergy medication.

Rep. Grace Meng, D-N.Y., wrote a letter to the head of the House Oversight Committee asking for a hearing on the increase of the drug used to treat people having a serious allergic reaction. Meng is the latest lawmaker to scrutinize the recent hike from about $57 to $500.

"The free market can be a wonderful engine for good in our society, and it has certainly led to the production of countless medical innovations," she said in a statement. "We must be vigilant, however, to not cross the line of price-gouging, especially when a product has been around for a generation and is incredibly cheap to produce."

Other lawmakers have weighed in on the increase. On Monday, Sen. Chuck Grassley, R-Iowa, wrote to Mylan, the manufacturer, asking for a reason for the sudden spike. Sen. Richard Blumenthal, in a separate letter on Monday, demanded Mylan lower the price to an "affordable, accessible level."

The House Oversight Committee has weighed in on high drug prices, but sparingly. It held a hearing in February on companies that buy older generics with no competition and then drastically raise the price.

The hearing featured an appearance by infamous former pharmaceutical CEO Martin Shkreli, whose former company Turing raised the price of an anti-malarial drug by 5,000 percent. Shkreli left Turing after he was indicted on securities fraud by the federal government in December.