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Dolasetron
Information about Dolasetron
Dolasetron (doe las’ e tron) is a 5-HT3 receptor blocker used as an antiemetic to prevent nausea and vomiting postoperatively or after cancer chemotherapy.
FDA approval information for Dolasetron
It was first approved in 1997 and is available as tablets of 50 and 100 mg and as a solution for injection in single or multidose vials (20 mg/mL) under the brand name Anzemet.
Mechanism of action of Dolasetron
As with most 5-HT3 receptor blockers, the dose varies by mode of administration, indication and expected severity and duration of nausea.
Side effects of Dolasetron
Side effects include headache, fatigue, diarrhea and dizziness. Dolasetron can prolong the QTc interval and is susceptible to drug-drug interactions.
Antidiarrheal agents
Antidiarrheal agents include bulk forming agents, hydroscopic agents, bile acid resins, bismuth, inhibitors of intestinal motility, non-absorbed antibiotics and hormones. Bulk forming agents include methylcellulose; hydroscopic agents include pectin and kaolin; bile acid resins are cholestyramine, colestipol and colesevalam; inhibitors of intestinal motility include opioids such as diphenoxylate and loperamide. Antibiotics include rifamycin and rifaximin which are non-absorbed and are used for travelers' diarrhea. Hormones with antidiarrheal activity include octretide and somatostatin. Most antidiarrheal agents are active locally in the small intestine and colon and are largely not absorbed. Some, however, have been implicated in rare causes of liver injury (senna, cascara, cholestyramine). Telotristat is a relatively new agent that inhibits the synthesis of serotonin and is used specifically for the diarrhea of carcinoid syndrome.
- Cholestyramine
- Colesevelam
- Colestipol
- Crofelemer
- Difenoxin
- Diphenoxylate
- Kaolin
- Loperamide
- Methylcellulose
- Octreotide
- Pectin
- Rifamycin
- Rifaximin
- Somatostatin
- Telotristat
Antiemetics are a diverse group of medications that act at different points in the pathways that regulate nausea and vomiting. These include antihistamines, anticholinergic agents, phenothiazines, serotonin type 3 receptor blockers, centrally acting benzamides, cannabinoid receptor agonists, substance P antagonists and miscellaneous.
Anticholinergic Agents
Antihistamines
Cannabinoid Receptor Agonists
- Dronabinol, Nabilone, Tetrahydrocannabinol
- Phenothiazines [See Antipsychotic Agents]
- Chlorpromazine, Prochlorperazine
Serotonin 5-HT3 Receptor Antagonists
Substance P/Neurokinin 1 Receptor Antagonists
Miscellaneous
Acid peptic disease/antiulcer agents that include antacids, the histamine type 2 receptor blockers (H2 blockers), and the proton pump inhibitors (PPIs). These agents are some of the most commonly taken medications and are very well tolerated, most being available both by prescription and over-the-counter. While many of these drugs are approved for use in duodenal and gastric ulcer disease, their major use is for acid reflux and indigestion.
Histamine H2 Receptor Antagonists (H2 Blockers) Cimetidine, Famotidine, Nizatidine, Ranitidine
Cathartics, laxatives or agents for constipation include bulk forming agents, osmotic agents, stool wetting agents, nonspecific stimulants, prokinetic agents and agents that increase fluid secretion. Many of these therapies are not systemically absorbed and none are considered particularly hepatotoxic. Naldemedine and naloxegol are opioid antagonists and are used to treat the constipation associated with opioid use.
- Bisacodyl
- Cascara Sagrada
- Castor Oil
- Docusate
- Fiber, Bran
- Lactulose
- Magnesium Sulfate
- Methylcellulose
- Naldemedine (Opioid Antagonist)
- Naloxegol (Opioid Antagonist)
- Plecanatide (for Chronic Idiopathic Constipation)
- Prucalopride (for Chronic Idiopathic Constipation)
- Senna
Inflammatory bowel disease encompasses several disorders, most commonly ulcerative colitis and Crohn colitis. Agents can be classified as 5-aminosalicyclic acid (5-ASA) based agents, immunosuppressive drugs, antitumor necrosis factor agents, corticosteroids, antibiotics and miscellaneous.
5-Aminosalicyclic Acid (5-ASA) Derivatives
Immunosuppressive Agents
Tumor Necrosis Factor Antagonists
Miscellaneous
Irritable Bowel Syndrome Agents Antimuscarinics/Antispasmodics [See Anticholinergic agents
Prokinetic Agents - See Serotonin 5-ht4 receptor agonists Alosetron, Cisapride, Domperidone, Linaclotide, Lubiprostone, Metoclopramide, Plecanatide, Prucalopride, Tegaserod
Other
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