Ferring Inc. is recalling three lots of DDAVP Spray (desmopressin acetate nasal solution, 10 micrograms/spray) because the product may contain a higher than labelled dose of the active ingredient (desmopressin) and could pose an overdose risk. DDAVP Spray is a prescription antidiuretic drug used to treat an uncommon brain disorder called central diabetes insipidus (genetic or acquired) caused by a deficiency of antidiuretic hormone (ADH). It is also used to control temporary frequent urination, extreme thirst, and loss of water following head trauma or surgery in the pituitary gland in the brain. Taking too much desmopressin may cause headache, nausea, vomiting, abdominal cramps, facial flushing and weight gain because of water retention and, in severe cases, convulsions. Health Canada is monitoring the company's recall and will inform Canadians if new safety information becomes available.