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The QTc interval is longer in females, as well as having a stronger response to IKr-blocking agents. In males, the presence of testosterone upregulates IKr channels and therefore decreases QT interval. [2] Stated otherwise, estrogens prolong the QT interval, while androgens shorten it and decrease the response to IKr-blocking agents. [citation ...
In 2001, the FDA changed the labeling requirements for droperidol injection to include a Black Box Warning, citing concerns of QT prolongation and torsades de pointes.The evidence for this is disputed, with 9 reported cases of torsades in 30 years and all of those having received doses in excess of 5 mg. [9] QT prolongation is a dose-related effect, [10] and it appears that droperidol is not a ...
In addition, in older patients and in patients with heart failure, a slow heart rate, underlying cardiac disease, and those with renal impairment, monitoring with electrocardiography is indicated when this drug is used. Congenital long-QT syndrome and drugs that prolong the PR or QRS interval are contraindications to dolasetron therapy.
[35] [36] The antiemetic effects of metoclopramide were found to be partially because of its serotonin antagonism. [ 30 ] While Fozard was investigating cocaine analogues, researchers at Sandoz identified the potent, selective 5-HT 3 receptor antagonist ICS 205-930 from which the first marketed selective 5-HT 3 receptor antagonists ondansetron ...
An antiemetic is a drug that is effective against vomiting and nausea. Antiemetics are typically used to treat motion sickness and the side effects of opioid analgesics, general anaesthetics, and chemotherapy directed against cancer. They may be used for severe cases of gastroenteritis, especially if the patient is dehydrated. [1] [2]
Adverse effects include prolongation of the QT interval on EKG. Medications include droperidol and haloperidol. Phenothiazines are particularly effective in treating opioid-induced PONV. Adverse effects are dose-dependent and include sedation and extrapyramidal symptoms. Medications include promethazine, chlorpromazine and prochlorperazine.
The risk is also higher in people taking other medicines that prolong the QT interval, as well as in people with congenital long QT syndrome, congestive heart failure, and/or bradyarrhythmias. As such, single doses of injectable ondansetron should not exceed 16 mg at one time.
Hypertension, QT interval prolongation, haemorrhage, blood clots, neutropenia, thrombocytopenia, neutropenia, thrombocytopenia, elevated thyroid-stimulating hormone, hypothyroidism, electrolyte disturbances, hypo- or hyperglycaemia, torsades de pointes (uncommon), heart failure (uncommon), hepatic failure (uncommon), GI perforation (uncommon ...