The maker of controversial alcoholic energy drink Four Loko said it would remove caffeine and other stimulants from all of its beverages ahead of an expected crackdown by U.S. regulators.

Chicago-based Phusion Projects said late Tuesday that it planned to reformulate its Four Loko drinks to remove caffeine, guarana and taurine.

“We are taking this step after trying — unsuccessfully — to navigate a difficult and politically charged regulatory environment at both the state and federal levels,’’ Phusion’s three co-founders and managing partners said in a statement on the company’s website.