A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.
The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.
Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.
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Compazine is a medication commonly prescribed to treat nausea and vomiting but can also be used for migraine treatment. Compazine was initially used as an antipsychotic agent but is no longer used for this purpose.
Compazine works by blocking dopamine receptors in the brain responsible for feelings of nausea. Compazine blocks the release of hormones that cause nausea and vomiting.
Compazine is available in 5 mg and 10 mg tablets.
The normal dose of Compazine is 5 to 10 mg by mouth every 3 to 4 hours as needed for nausea and vomiting.
The maximum dose of Compazine in one day is 40 mg.
Take Compazine with food or water as tolerated.
The active ingredient in Compazine is prochlorperazine, which is also the name of the Compazine generic.
Common drug-drug interactions with Compazine include:
Older adults with dementia-related psychosis should not use Compazine because antipsychotic medications have been shown to increase death risk when used for this purpose.
Use caution if you have a history of heart disease.
Compazine should not be used for the long-term treatment of nausea and vomiting.
Compazine can cause dizziness or drowsiness. Do not drive until you know how it will affect you.
Common adverse reactions to Compazine may include:
Compazine [package insert]. Research Triangle Park, NC: GlaxoSmithKline; 2004.