Purdue has rapidly dwindling cash as they have lost all of their recent lawsuits. As well Opana ER Oxymorphone has taken over vs ER Oxycontin. Meanwhile Purdue is not collecting royalties on Pfizer's Embeda as there are minimum Prescriptions sales if any.
As well Pfizer has yet to launch Troxyca which would be even more unstable than Embeda due to the higher temp and press caused by higher mass in the extruder. Troxyca has a higher Naltrexone to Agonist vs Embeda.