A little more than two years after first licensing U.S. commercial rights to the Nucynta (tapentadol) pain drug franchise from Depomed Inc., specialty pharma Collegium Pharmaceutical Inc. is acquiring those rights from Depomed successor Assertio Therapeutics Inc. for $375 million in cash,  less royalties paid to Assertio in 2020. The deal, which includes both extended-release (ER) and immediate-release formulations of the drug, is expected to close by Feb. 14. It will be financed with $325 million in committed debt financing.