Some opioid antagonists are not pure antagonists but in fact do produce some weak opioid partial agonist effects, and can produce analgesic effects when administered in high doses to opioid-naive individuals.
Does the US Navy have 10 or 19 Aircraft Carriers? The U.S. Navy operates 19 ships that could be called aircraft carriers, but only considers 10 to be actual carriers. Last week the U.S. Navy accepted USS America, first of the America-class amphibious assault ships, into service.
The U.S. Army has 490,046 active duty and 557,246 reserve and national guard. The U.S. Air Force has 309,339 active duty, 74,400 reserve, and 106,700 air national guard. The U.S. Navy has 326,046 active duty, and 107,115 reserve.