You may have CNS effects from either receptor. Anticholinergics typically receptor blockers.
Antimuscarinic effects are most common, and are typified by atropine.
It is important to carry away a working knowledge of names for the parts of the liver. Like tributaries of a river, they flow into bile ductules and then ducts, and finally one large hepatic duct, on the common bile duct. The stones block bile flow and it backs up. The bile, being a digestive fluid, can break down membrane lipids in cases of prolonged contact. Thus, you may get damage and inflammation in the gallbladder, or even possibly damage to bile ducts and canaliculi and hepatic parenchymal cells.