A, In Massachusetts, implementation of the limit was associated with an immediate level decrease in days supplied (−0.4 days [95% CI, −0.6 to −0.2 days]) but no significant slope change (0 d/mo [95% CI, −0.02 to 0.02 d/mo]). B, In Connecticut, implementation of the limit was not associated with a significant immediate level change in days supplied (−0.3 days [95% CI, −0.7 to 0.1 days]) or slope change (0 d/mo [95% CI, 0-0 d/mo]).