antihistamine. Antihistaminic Pharmacology An agent that counteracts the effects of histamine released during allergic reactions by blocking histamineâH 1 receptors Adverse effects Dry mouth, drowsiness, urine retention in â, tachycardia.hile the term antihistamine can broadly include any agent that blocks any histamine receptor, in practice it is usually used to denote those blocking the H 1 type of receptors (H1 receptor antagonists), those involved in allergic reactions.
While all of these Military service branches are uniformed, have. weapons, ranks and other such details that are. similar, the specific missions and focus of. each service is quite different. The US Army is charged as the primary land. combat force.
Five military branches exist within the United States Armed Forces. While these. branches are all separate entities, they often work together, especially. in times of war, to facilitate troop movements, equipment, as well as food, armaments and medical supplies. Army â The Army is one of the oldest military services, established in the. United States way back during the Continental Congress on June 1775. In part. due to its age, the Army and is also the largest of the US military service. branches. The primary duty of the Army is to protect and defend not only the. United States, but also its interests around the world through the use of ground. troops, artillery, and tactical weapons.