with regards to the initial list of diseases shared, can you explain the first one?
It is a medical condition in which spasm of arteries cause episodes of reduced blood flow
Raynaud syndrome
Raynaud syndrome, also known as Raynaud's phenomenon, is a medical condition in which spasm of arteries cause episodes of reduced blood flow.
a substance that binds to a receptor and has an agonistic or antagonistic effect is called Receptor antagonist can you give a few examples? Alpha blockers, beta blockers, and calcium channel blockers how is the first one classified? UNANSWERABLE does the first mentioned example have any side effects? Yes, dizziness, drowsiness, weakness, fatigue, psychiatric depression, and dry mouth does it also have any scientific/health use? Yes, used to treat Raynaud's disease, congestive heart failure (CHF), pheochromocytoma, and erectile dysfunction what is the meaning of the last mentioned disease? It is the type of sexual dysfunction in which the penis fails to become or stay erect during sexual activity what is the cause of it? Surgical intervention may remove anatomical structures necessary to erection, and  is associated with bicycling due to both neurological and vascular problems due to compression what are the ways it can be treated? Exercise, particularly of the aerobic type and counseling, if cause is psychological what are some types of the exercise mentioned above? Physical, Dynamic and static
wiki:5028155
Raynaud syndrome [SEP] Introduction
Raynaud syndrome, also known as Raynaud's phenomenon, is a medical condition in which spasm of arteries cause episodes of reduced blood flow. Typically, the fingers, and less commonly the toes, are involved. Rarely, the nose, ears, or lips are affected. The episodes result in the affected part turning white and then blue. Often, numbness or pain occurs. As blood flow returns, the area turns red and burns. The episodes typically last minutes, but can last several hours. Episodes are often triggered by cold or emotional stress. Primary Raynaud's, also known as idiopathic, means that it is spontaneous and unrelated to another disease.