Final answer:
Protriptyline is not used for treating tics in Tourette's syndrome, unlike the other drugs listed. A muscarinic agonist would serve as an antidote to atropine poisoning. Botulinum toxin works by reducing acetylcholine release from motor neurons.
Step-by-step explanation:
The agent that would not be useful for the treatment of tics in Tourette's syndrome from the options provided is E. Protriptyline. Fluphenazine, molindone, botulinum toxin type A, and haloperidol are all medications that have been used to manage symptoms of Tourette's syndrome to various extents. Protriptyline is a tricyclic antidepressant and is not typically used for treating tics.
In the context of atropine poisoning, c. muscarinic agonist would be the type of drug that serves as an antidote. Regarding drugs with anti-anxiety effects, typically benzodiazepines, SSRIs (selective serotonin reuptake inhibitors), and some other medication classes are known to have anxiolytic properties.
Concerning the mechanism of action of botulinum toxin (Botox), it works by d. decreasing the release of acetylcholine from motor neurons, leading to a flaccid paralysis of muscles, which is also the basis for its use in cosmetic procedures.