Nulavance Adapalene, a artificial retinoid, is available as an over the counter drug (Differin). And prescription-most effective retinoid acid, or tretinoin (Retin-A), is greater powerful, yet harsher on the pores and Nulavance. It’s available in specific strengths, from least to most effective: 0.1/2%, zero.05%, and 0.1%. http://ipsnews.net/business/2020/12/22/nulavance-cream/