Amlodipine is a long-acting calcium channel blocker.
Target: Calcium Channel
Amlodipine is a dihydropyridine calcium antagonist (calcium ion antagonist or slow-channel blocker) that inhibits the movement of calcium ions into vascular smooth muscle cells and cardiac muscle cells. Experimental data suggest amlodipine binds to both dihydropyridine and nondihydropyridine binding sites. The contractile processes of cardiac muscle and vascular smooth muscle are dependent upon the movement of extracellular calcium ions into these cells through specific ion channels. Amlodipine inhibits calcium ion influx across cell membranes selectively, with a greater effect on vascular smooth muscle cells than on cardiac muscle cells. Negative inotropic effects, or decreased heart muscle contractility, can be detected in vitro, but such effects have not been seen in intact animals at therapeutic doses. Serum calcium concentration is not affected by amlodipine. Within the physiologic pH range, amlodipine is an ionized compound (pKa = 8.6), and its interaction with the calcium channel receptor is characterized by a gradual rate of association and dissociation with the receptor binding site, resulting in a gradual onset of effect. Amlodipine is a peripheral arterial vasodilator that acts directly on vascular smooth muscle to cause a reduction in peripheral vascular resistance and reduction in blood pressure. From Wikipedia.

Acetylcholine chloride  Acetylcholine is a neurotransmitter that can induce the opening of calcium channels.

Target: Calcium Channel; nAChR; mAChR
Acetylcholine in vertebrates is the major transmitter at neuromuscular junctions, autonomic ganglia, parasympathetic effector junctions, a subset of sympathetic effector junctions, and at many sites in the central nervous system. It is generally not used as an administered drug because it is broken down very rapidly by cholinesterases, but it is useful in some ophthalmological applications.
Acetylcholine chloride, more commonly referred to as just acetylcholine, is a cholinergic neurotransmitter that can induce the opening of calcium channels, as well as act on nicotinic and muscarinic acetylcholine receptors. Acetylcholine plays an important role at many sites in the central nervous system. The compound has been shown to have ophthalmological uses and can be broken down quickly by choliesterases. Studies show that non-neuronal acetylcholine influences many basic cells functions, such as mitosis, cells differentiation, cytoskeletal organization, and cell to cell contact, among other functions [1-3].