Smiths Medical allegedly conspired with United Therapeutics to stifle a generic version of pulmonary arterial hypertension drug Remodulin, according to a lawsuit filed this week by Novartis (NYSE:NVS) unit Sandoz.

The  Smiths Group (LON:SMIN) subsidiary, which is slated for a spinout as a separately traded company next year, makes the infusion pumps and single-use cartridges for the PAH drug treprostinil, sold by United Therapeutics under the brand name Remodulin.

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