Use a claw hammer to remove the nails. Insert the blade of a reciprocating saw behind boards as needed to cut off stubborn or broken nails that you can't remove with the hammer. Remove the remaining part of the nail with diagonal pliers. Grasp board B -- the weatherboard you're replacing -- with both hands.
Desmopressin, sold under the trade name DDAVP among others, is a medication used to treat diabetes insipidus, bedwetting, hemophilia A, von Willebrand disease, and high blood urea levels. In hemophilia A and von Willebrand disease, it should only be used for mild to moderate cases.
Why is this medication prescribed? Desmopressin is used to control the symptoms of a certain type of diabetes insipidus ('water diabetes'; condition in which the body produces an abnormally large amount of urine).