A growth hormone-stimulating drug by Aeterna Zentaris Inc., of Quebec City, achieved its endpoint as a diagnostic for adult growth hormone deficiency (AGHD) according to top-line results from a Phase III trial reported by the company Tuesday. The drug, AEZS-130 (Solorel), was given to a group of growth hormone-deficient and normal patients, and diagnosis based on response to the drug had sensitivity and specificity greater than 90 percent.