Drugmakers, beware: if you boost the price on your products too much, a pharmacy benefit manager may just kick it off its list of approved formularies as the default option for doctors to prescribe.

That’s what CVS Caremark has started to do, according to Fierce Healthcare, to save its PBM clients bucks. In fact, CVS Caremark estimates that it has saved its PBM clients an average of $15 per 30-day supply on drugs, with clients on its new formulary model paying an average of $88.30 for a 30-day drug supply, compared to $102.58 for other formulary designs.