Zofenopril calcium (SQ26991) is an antioxidant that acts as an angiotensin-converting enzyme inhibitor. ACE Zofenopril is a pro-drug designed to undergo metabolic hydrolysis yielding the active free sulfhydryl compound zofenoprilat, which is an angiotensin converting enzyme (ACE) inhibitor . Zofenopril promotes the regeneration of peripheral nerve injuries in rat models . Zofenopril increases SR calcium cycling and stimulates active calcium uptake into the SR .