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.
A very rare but serious side effect of desmopressin is severe water retention that causes an imbalance of sodium and water in the body (called water intoxication, or hyponatremia). Water intoxication can lead to coma or death. Some signs of water intoxication are drowsiness (lethargy), vomiting, and nausea.