All of the following are direct-acting cholinergic agonists, except:*1 pointPilocarpineNeostigmineCarbacholCevimeline

The question is asking which of the following is not a direct-acting cholinergic agonist: Pilocarpine, Neostigmine, Carbachol, Cevimeline.

Direct-acting cholinergic agonists are drugs that mimic the action of acetylcholine, a neurotransmitter in the body. They bind directly to the cholinergic receptor and activate it.

1. Pilocarpine: It is a direct-acting cholinergic agonist. It is used to treat dry mouth and glaucoma.

2. Neostigmine: It is an indirect-acting cholinergic agonist. It works by inhibiting the action of acetylcholinesterase, the enzyme that breaks down acetylcholine in the body. This increases the amount of acetylcholine available to stimulate the cholinergic receptors.

3. Carbachol: It is a direct-acting cholinergic agonist. It is used to treat glaucoma and during ophthalmic surgery.

4. Cevimeline: It is a direct-acting cholinergic agonist. It is used to treat symptoms of dry mouth in patients with Sjogren's Syndrome.

So, the answer is Neostigmine. It is not a direct-acting cholinergic agonist, but an indirect one.