直接作用和间接作用的胆碱受体刺激剂有许多不同之处。而直接作用的胆碱受体实际上是毒蕈碱受体或直接作用的烟碱受体胆碱受体是可逆和不可逆的。其次，直接作用的胆碱受体刺激剂是在PNS的神经效应连接处模拟乙酰胆碱的药物，而直接作用的胆碱受体刺激剂是乙酰胆碱代谢的抑制剂。第三，直接作用的机制是它们通常与G蛋白偶联，其中cGMP的增加可能进一步导致IP3的活化。DAG级联进一步打开与Ca2+通道和IP3相关的平滑肌，导致Ca2+从肌浆网释放(Blount et al . 314-321)。间接作用类胆碱药物的作用机理是阻断乙酰胆碱的酶解，提高乙酰胆碱的局部浓度。直接作用的胆碱受体兴奋剂一般用于其毒性目的，也用于戒烟，而间接作用的拟胆碱药物用于治疗青光眼、重症肌无力、神经肌肉膜逆转等疾病。
快速脱敏是对某些或其他种类的抗生素过敏的病人实施的治疗程序。用于快速脱敏的程序包括在一定时间内增加可能对人体过敏的物质的数量。正因为如此，人的身体可能会对它曾经过敏的东西产生免疫(Trussell & Laurence 4562)。这个过程是有用的，因为它有助于身体对一些可能对人过敏的药物产生免疫。在这个过程中，除非病人有一个主流的饮食习惯，否则病人会定期注射这种疫苗。通过快速脱敏，一个人可以在一天内完成几天的积累。一般来说，病人在手术后会立即做出反应。这个过程是非常有用的，因为人体的身体变得完全脱敏或更习惯于过敏。另一个好处是，身体也可以学习制造一些保护性抗体，可以对抗一些过敏。肾上腺素的脱敏过程比去甲肾上腺素的脱敏过程更为重要。
There are a number of differences in the direct acting and indirect action cholinoceptor stimulant. While direct acting cholinoceptor stimulant are actually the muscarinic receptors or they are the nicotinic receptors in direct acting that cholinoceptor stimulant is reversible and irreversible. Secondly, directing acting cholinoceptor stimulant are the drugs which mimic ACh at neuroeffector junctions of PNS while the in-direct are the ones which are the inhibitors of ACh metabolism. Thirdly, the mechanism which is used for the direct acting is that they are generally coupled to the G proteins in which there is an increase in cGMP that may further lead to the activation of the IP3. DAG cascade which further opens the smooth muscles related to the Ca2+channels and IP3 lead to the release of Ca2+ from sarcoplasmic reticulum (Blount et al 314-321). The mechanism used in Indirect-acting Cholinomimetic Drugs is that they do the blocking of the enzymatic hydrolysis of acetylcholine and helps in the increase of the local concentration of Ach levels. The direct acting cholinoceptor stimulants are generally used for the purpose of its toxicity and are also used as for the cessation of smoking while Indirect-acting Cholinomimetic Drugs are used in the treatments of the diseases such as Glaucoma, Myasthenia Gravis, and reversal of the neuromuscular membrane.
Rapid desensitization is the procedure which is implemented with those patients who may be allergic to some or the other kind of antibiotics. The procedure which is used for rapid desensitization includes the increase in the amounts of the materials which may be allergic to the body of the person for a given period of time. Because of this, the body of the person may become immune to something that it had been allergic (Trussell & Laurence 4562). This process is useful as it helps the body to become immune to some of the medicines which may be allergic to the people. In the procedure the patient is given this shot regularly unless there is a mainstream diet in the person. Through rapid Desensitization one can have the completion of the buildup of several days in one day. Generally, there is an immediate response from the patient after this procedure. This process is very helpful as the body of the human body becomes completely desensitized or much more accustomed to the allergies. Other benefit is that the body can also learn to make some of the protective antibodies which can work against some of the allergies. The process of desensitization of epinephrine is more important than that of nor norepinephrine.