emetic

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Related to Emetics: Antiemetics, ipecac

emetic

(əmĕt`ĭk), substance that produces vomiting. Direct, or gastric, emetics, which act directly on the stomach, include syrup of ipecacipecac
, drug obtained from the dried roots of a creeping shrub, Cephaelis (or Psychotria) ipecacuanha, native to Brazil but cultivated in other tropical climates.
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, sulfate of zinc or copper, alumalum
, any one of a series of isomorphous double salts that are hydrated sulfates of a univalent cation (e.g., potassium, sodium, ammonium, cesium, or thallium) and a trivalent cation (e.g., aluminum, chromium, iron, manganese, cobalt, or titanium).
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, ammonium carbonate, mustard in water, or copious quantities of warm saltwater. Indirect, or systemic, emetics, such as apomorphine, induce vomiting by acting indirectly through the blood on the brain center that controls vomiting. Emetics are not used to treat poisoning by strong acids or alkalis, petroleum distillates such as kerosene, or substances causing convulsions.

Emetic

 

an agent that induces vomiting. Emetics are distinguished according to whether they act on the vomiting center in the brain (for example, apomorphine) or whether they irritate the mucous membrane of the stomach and reflexly excite the stomach’s vomiting center (ipecac or thermopsis). Emetics are used to counteract the effects of poisoning and to treat chronic alcoholism. For example, an injection of apomorphine combined with ingestion of alcohol leads to a conditioned reflex causing the taste and odor of alcohol to induce vomiting. When taken in small doses, emetics act as expectorants.

emetic

[i′med·ik]
(pharmacology)
Any agent that induces emesis.

emetic

1. causing vomiting
2. an emetic agent or drug
References in periodicals archive ?
Emetic stimuli entering the general circulation can trigger the nerve receptors in the CTZ directly because, unlike the rest of the central nervous system, this region of the brainstem has a reduced blood-brain barrier.
23) Many other drugs (apart from emetic chemotherapeutic regimes) are known to cause nausea--some at therapeutic doses, eg opioids, and some in toxicity, eg digoxin.
a 2-drug combination of 5HT3 antagonist and dexamethasone for chemotherapy with moderate emetic risk.
To prevent delayed emesis in patients receiving cisplatin and other high emetic risk agents, dexamethasone and aprepitant is recommended on day 2 and 3 as well.
In the prodromal phase, the physician and patient have the chance to abort the emetic phase.
Combining antiemetics that act on different receptor sites may result in improved efficacy, so instead of increasing the dose of 25 mg of Phenergan (promethazine) or 8 mg of ondansetron, for example, another antiemetic agent that works on different emetic receptors can be added to improve efficacy, Dr.
Researchers do not know which neurotransmitters are the most important in the brain's emetic center.
In addition, patients who received Kytril Tablets also experienced significantly fewer emetic episodes during the first day of radiation and over the four-day treatment period compared to patients in the historical negative control group.