Abstract: Polycondensation silicone elastomer dosage forms adapted for the continuous and controlled release of iodine values, notably to domestic water supplies for the treatment of the various disease states attributed to iodine deficiency, are shaped from (A) at least one diorganopolysiloxane oil bearing at least two condensable or hydrolyzable groups, or a single hydroxyl group, at each end of the polymer chain; (B) a therapeutically effective amount of at least one water soluble, nontoxic, organic and/or inorganic iodine compound which is in solid or liquid state at ambient temperature and which does not inhibit curing of the composition into an elastomer; (C) a catalytically effective amount of a polycondensation catalyst; and optionally, (D) a silane containing at least three condensable or hydrolyzable groups.