Pregnant women suffering from the common cold can be reassured about the safety of short-term use of OTC cold medications. These drugs, however, should not be used indiscriminately or for extended periods of time. In addition, use should be confined to only those products that are appropriate for the symptoms.
Acetylcholine (ACh) is a common neurotransmitter secreted by a variety of neurons. It binds to two different receptors-Ionotropic (fast) nicotinic receptors and metabotropic (slow) muscarinic receptors. 1  role in central nervous system. 2  role in peripheral nervous system. 3  receptors and signaling. 4  agonists and antagonists.
The post-ganglionic neurons of the ParaSNS secrete acetylcholine, which binds to muscarinic receptors on their effector organs. The post-ganglionic neurons of the SNS secrete norepinephrine or epinephrine, which bind to alpha or beta adrenergic receptors on their effector organs. A couple exceptions in the SNS: The adrenal medulla itself can actually be thought of a post-ganglionic neuron.