Two House Democrats on Thursday accused makers of multiple sclerosis drugs with raising prices on older drugs to match the price of newer drugs from their competitors.

Reps. Elijah Cummings, D-Md., and Peter Welch, D-Vt., sent letters to seven drug makers seeking answers about price hikes for MS drugs. The lawmakers, who have been investigating high drug prices, say the prices for MS drugs are rising to meet, or shadow, the prices of newer entrants in the market.

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