Chong J et al review the 23 placebo-randomized trials of just-FDA-approved roflumilast and its sister cilomilast, the oral phosphodiesterase-4 inhibitors.
Cochrane review on roflumilast and cilomilast
Chong J et al review the 23 placebo-randomized trials of just-FDA-approved roflumilast and its sister cilomilast, the oral phosphodiesterase-4 inhibitors.