This drug is used generally as somnorific. 5-HT4 agonists. Cisapride is a serotonin and cholinergic agonist used as a prokinetic drug, it was withdrawn from the U.S. market because of cardiovascular toxicity.Non-selective agonists. Ergotamine activates a more than one subtype of 5-HT receptor, it binds to 5-HT1A, 5-HT1D, 5-HT1B, D2 and norepinephrine receptors.his drug is used generally as somnorific. 5-HT4 agonists. Cisapride is a serotonin and cholinergic agonist used as a prokinetic drug, it was withdrawn from the U.S. market because of cardiovascular toxicity.
Lower extremity venography is a test used to see the veins in the leg. X-rays are a form of electromagnetic radiation like light, but of higher energy, so they can go through the body to form an image on film.
There are three types of veins in the legs: 1  Superficial veins, which are the ones just below the skin surface. You can often see or feel the larger superficial veins. The superficial leg veins are the ones that may develop into varicose veins. 2  Deep leg veins, which pass through the muscles. You cannot see or feel these.