The drug of choice for mushroom poisoning is which of the following?

Symptoms of mushroom poisoning are due to excess of muscarine. The polypeptides from these mushrooms are inhibitors of cellular protein synthesis and stimulates post ganglionic cholinergic fibres. Atropine sulphate is the preferred drug of choice to counteract the muscarinic effects. Ref: The Essentials of Forensic Medicine And Toxicology by Dr. K. S. Narayan Reddy 27th edition; Pages 564 - 565; K D Tripathi Texbook of Pharmacology 5th edition; page 100.