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Atipamezole, sold under the brand name Antisedan among others, is a synthetic α 2 adrenergic receptor antagonist used for the reversal of the sedative and analgesic effects of dexmedetomidine and medetomidine in dogs. Its reversal effect works by competing with the sedative for α 2-adrenergic receptors and displacing them.
Epinephrine is also used as a bronchodilator for asthma if specific β 2 agonists are unavailable or ineffective. [39] Because of the high intrinsic efficacy (receptor binding ability) of epinephrine, high drug concentrations cause adverse side effects when treating asthma. The value of using nebulized epinephrine in acute asthma is unclear. [40]
Dexmedetomidine was developed by Orion Pharma and is marketed under the names dexdor® and Precedex®; in 1999 the US Food and Drug Administration (FDA) approved it as a short-term sedative and analgesic (<24 hours) for critically ill or injured people on mechanical ventilation in the intensive care unit. The rationale for its short-term use ...
Half the dogs received bedinvetmab and half the dogs received a sterile saline injection every 28 days for a total of three doses. [5] Before treatment and on various days throughout the study, owners used the Canine Brief Pain Inventory (CBPI) assessment tool to measure the severity of the dog's pain and the degree to which the pain interfered ...
It is available mixed with a small amount of epinephrine to increase the duration of its action. [5] It typically begins working within 15 minutes and lasts for 2 to 8 hours. [5] [6] Possible side effects include sleepiness, muscle twitching, ringing in the ears, changes in vision, low blood pressure, and an irregular heart rate. [5]
However, the serotonin receptor antagonism has side effects such as weight gain and impaired movement. [11] Hence, alpha-2 blockers are not used clinically due to its extensive binding. Similar to the alpha-1 blocker, the alpha-2 family will also present the first-dose effect , but it is generally less pronounced compared with the alpha-1 blockers.
Administration of intravenous fluid bolus and epinephrine is the treatment of choice with antihistamines used as adjuncts. [46] A period of in-hospital observation for between 2 and 24 hours is recommended for people once they have returned to normal due to concerns of biphasic anaphylaxis. [10] [15] [41] [47]
A later study, by Lands and Grant, showed that a dose of ~0.6 mg/kg of racemic synephrine, given intravenously to anesthetized dogs, produced a rise in blood pressure of 34 mmHg lasting 5–10 minutes, and estimated that this pressor activity was about 1/300x that of epinephrine. [63] Using cats and dogs, Tainter and Seidenfeld observed that ...