You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following agents is recommended for medical treatment of variceal bleed - and explain in detail?
The vasoconstrictors somatostatin and octreotide are used to treat acute bleeding in patients with poal hypeension before performing endoscopy. Intravenous infusions of octreotide will lower poal blood pressure and can prevent rebleeding during the patient's initial hospitalization Ref Davidson edition23rd pg868