any other skin condition, with a potential to affect the nails or to interfere with evaluation of the disease;

history of hypersensitivity to retinoids or to other components of the trial medication

topical treatment of nails with antipsoriatics in the 4 weeks preceding the treatment phase;

systemic treatment of psoriasis within the three months before the treatment phase of the trial or during the trial

intralesional steroid injection before the treatment phase of the trial

phototherapy before the treatment phase of the trial;

any chronic infection or condition capable of interfering with the conduct of the trial;

evidence of drug or alcohol abuse;

symptoms of a clinically significant illness that may influence the outcome of the trial in the four weeks preceding the treatment phase of the trial;

participation in another clinical trial within the last 4 weeks prior to first treatment in this clinical trial;

pregnancy or nursing;

Efficacy and Safety of Tazarotene Gel in Nail Psoriasis

What this study is about