Phenergan (Promethazine)
Phenergan is the brand name for Promethazine. Brand-name medications typically cost significantly more than their generic equivalents, but both contain the same active ingredient and meet the same FDA standards.
Promethazine (Generic)
CheaperIs generic Promethazine the same as Phenergan?
- Generic Promethazine contains the same active ingredient as Phenergan, in the same strength and dosage form.
- Generic medications must meet FDA bioequivalence standards — the body absorbs them in the same way as the brand-name version.
- Inactive ingredients (dyes, fillers) can differ. If you have a sensitivity, mention it to your pharmacist.
- Most prescribers allow generic substitution unless they specifically mark "dispense as written" on the prescription.
- If you've been on Phenergan and feel a generic version isn't working, talk to your prescriber.
How to save on Phenergan (Promethazine)
Ask for generic substitution
If your prescription is written for Phenergan, ask your pharmacist whether generic Promethazine is appropriate for your case.
Compare cash prices
Cash prices for Phenergan vary widely between pharmacies. ScriptUnlock surfaces the lowest available locally.
Manufacturer copay card
Phenergan may offer a manufacturer copay card for insured patients. Check the official brand website.
Find the cheapest generic Phenergan
Generic Phenergan can cost significantly less than the brand version. Upload your prescription and let pharmacies compete on the lowest cash price.
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Phenergan vs generic Promethazine: FAQs
Is generic Phenergan the same as the brand-name version?
Generic medications contain the same active ingredient, in the same strength and dosage form, as their brand-name counterparts and must meet the same regulatory standards for safety and efficacy. Generic Phenergan works the same way as the brand-name version.
Is generic Phenergan cheaper?
Yes. Generic Phenergan is typically much cheaper than the brand-name version. ScriptUnlock compares cash prices on generic Phenergan across participating pharmacies to surface the lowest available price.
Can my pharmacy substitute generic Phenergan for the brand-name prescription?
In most cases, yes — pharmacists can substitute the generic equivalent unless your prescriber specifies "dispense as written" on the prescription. Ask your pharmacist if generic Phenergan is available.
How do I find the cheapest generic Phenergan?
Compare cash prices across multiple pharmacies before filling. ScriptUnlock surfaces the lowest cash price on generic Phenergan among participating pharmacies.
Are there side-effect differences between generic and brand Phenergan?
Generic medications contain the same active ingredient as the brand-name version. Inactive ingredients can occasionally differ. Consult your pharmacist if you notice any change after switching to a generic version.