In case you wondered whose side they were on.

WASHINGTON — In an unusual move, House Republicans are warning drug companies against complying with a House investigation into drug prices.

Republicans on the House Oversight Committee sent letters to a dozen CEOs of major drug companies warning that information they provide to the committee could be leaked to the public by Democratic chair Elijah Cummings in an effort to tank their stock prices.

Cummings requested information from 12 drug companies such as Pfizer Inc., Johnson & Johnson, and Novartis AG in January as part of a broad investigation into how the industry sets prescription drug prices.

In their letters, Reps. Jim Jordan and Mark Meadows — leaders of the hardline conservative House Freedom Caucus — imply that Cummings may be attempting to collect the information in order to bring down the industry’s stock prices.