The two placebo-controlled pivotal phase III trials included almost 2000 patients and healthy volunteers treated with alitretinoin. In the BACH trial (Benefit of Alitretinoin in Chronic Hand eczema) alitretinoin met its primary endpoint and the drug was effective in patients suffering from severe and refractory chronic hand eczema, as determined by the endpoint of clear and almost clear hands. In a second pivotal phase III trial, patients who relapsed after being initially responsive to alitretinoin also responded to a second course of treatment.
Basilea Pharmaceutica is currently conducting a phase III study on alitretinoin for the treatment of severe chronic hand eczema in the U.S. The "HANDEL" trial (HAND Eczema research of aLitretinoin) is the first ever multi-centered, controlled clinical study for patients with severe CHE performed in the U.S. The study takes place across the United States and will enroll 600 patients.
Alitretinoin is generally well tolerated and the observed side effects were typical of the retinoid class. Similar to other systemic retinoids, alitretinoin is a teratogen and therefore, alitretinoin is strictly contraindicated in women of child-bearing potential unless strict pregnancy testing and contraception is followed one month before, during and one month after cessation of treatment.