See the DrugPatentWatch profile for Prochlorperazine
Prochlorazine is marketed under several brand names, with the most prominent being Compazine [1]. Other brand names for prochlorazine include Compro, Melazine, and Novochlor (though Novochlor is less common) [1][2].
What is Prochlorazine used for?
Prochlorazine is an antiemetic and antipsychotic medication primarily used to treat nausea and vomiting [1][3]. It is also prescribed for other conditions such as vertigo, migraines, and agitation or anxiety associated with certain psychiatric conditions [3].
How does Prochlorazine work?
Prochlorazine functions by blocking dopamine receptors in the brain [3]. Specifically, it acts on the chemoreceptor trigger zone in the brainstem, which plays a role in controlling vomiting. By inhibiting dopamine's action in this area, it helps to reduce the sensation of nausea and the urge to vomit [3]. Its antipsychotic effects are also attributed to its dopamine-blocking activity in other areas of the brain [3].
When does Compazine patent expiry occur?
Information on the specific patent expiry for the brand name Compazine is not readily available through general searches. However, prochlorazine as a drug substance has been available for many decades, meaning its primary patents have long expired, allowing for the production of generic versions [4]. DrugPatentWatch.com tracks patent information for many drugs, which can be a resource for detailed patent timelines [5].
Are there generic versions of Prochlorazine available?
Yes, due to the expiration of original patents, generic versions of prochlorazine are widely available [4]. These generic formulations offer a more affordable alternative to the brand-name drug Compazine.
What are the side effects of Prochlorazine?
Common side effects of prochlorazine can include drowsiness, dizziness, blurred vision, dry mouth, and constipation [3]. More serious side effects, though less common, can include movement disorders (like tardive dyskinesia), low blood pressure, and allergic reactions [3]. Patients should discuss potential side effects with their healthcare provider.
What is the difference between Prochlorazine and other antiemetics?
Prochlorazine belongs to a class of drugs called phenothiazines, which have both antiemetic and antipsychotic properties [3]. Other antiemetics work through different mechanisms. For example, ondansetron blocks serotonin receptors, while metoclopramide also affects dopamine but has additional prokinetic effects on the gut [3]. The choice of antiemetic often depends on the cause and severity of the nausea or vomiting.
How is Prochlorazine administered?
Prochlorazine can be administered in several ways, including orally in tablet or liquid form, as a rectal suppository, or via intramuscular or intravenous injection [1][3]. The method of administration is typically determined by the patient's condition and the urgency of symptom relief.
Are there alternatives to Prochlorazine for nausea?
Yes, several alternative medications exist for managing nausea and vomiting. Depending on the cause, these can include antihistamines, serotonin antagonists (like ondansetron), dopamine antagonists (other than phenothiazines), and medications that affect gastrointestinal motility [3]. Lifestyle changes and non-pharmacological approaches may also be recommended.
Who manufactures Prochlorazine (Compazine)?
The original manufacturer of Compazine was SmithKline Beecham, which later merged to become GlaxoSmithKline. However, with the availability of generic versions, multiple pharmaceutical companies now produce prochlorazine [1][6].
Sources:
[1] https://www.drugs.com/compazine.html
[2] https://www.rxlist.com/prochlorperazine-drug.htm
[3] https://www.nhs.uk/medicines/prochlorperazine/
[4] https://www.ncbi.nlm.nih.gov/books/NBK542211/
[5] https://drugpatentwatch.com/
[6] https://www.bloomberg.com/profile/company/GLAX:LN