Fig. 5.

Release of tretinoin from Group I (A, C) and Group II (B, D) tretinoin microparticle-based tropical gels, 0.1 %, 0.08 %, 0.06 % and 0.04 %. Data are shown as mean ± SD (n = 6).

Release of tretinoin from Group I (A, C) and Group II (B, D) tretinoin microparticle-based tropical gels, 0.1 %, 0.08 %, 0.06 % and 0.04 %. Data are shown as mean ± SD (n = 6).