How to pay the least
Ask for the cash price
Generic fosphenytoin
No pharmacy we check posts a price for it.
- Ask your pharmacy for the cash price of generic fosphenytoin.Find pharmacies near you
- Ask one or two other pharmacies too. Cash prices for the same generic can differ a lot from store to store.
A regular generic has the same active ingredient as Cerebyx, and the FDA requires it to work the same way.
Compare every option
Details for each option
Brand nameNo maker’s card
We didn’t find a savings card or cash price from Cerebyx’s maker. Ask the pharmacy for Cerebyx’s cash price. With insurance, ask what your plan charges.
Authorized genericNot sold
There isn’t one. An authorized generic is Cerebyx itself, from the same company, sold without the brand name, and usually for less. A regular generic is sold, with the same active ingredient: ask the pharmacy for its price.
Regular genericWho makes it
3 companies sell a generic of Cerebyx that the FDA rates a substitute. A pharmacy fills whichever one it stocks. To get a certain maker, ask for it by name; most pharmacies can order it in a day or two.
It’s mostly filled by specialty pharmacies. Your prescriber’s office or insurer can tell you which one to use.
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Glenmark PharmaceuticalsSolution 50 mg/mL
Made by Gland Pharma
Product page on glenmarkpharma-us.com
How it looks, what’s in it, NDCs
50 mg/mL
Package NDC Carton of 50 mL 68462-621-54 50 mg/mL
Package NDC Carton of 100 mL 68462-622-64 50 mg/mL
Package NDC Carton of 100 mL 68462-945-64 Inactive ingredients: water, tromethamine, hydrochloric acid, sodium hydroxide
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Hikma PharmaceuticalsInjection 50 mg/mL
How it looks, what’s in it, NDCs
50 mg/mL
Package NDC Carton of 50 mL 0641-6136-25 50 mg/mL
Package NDC Carton of 100 mL 0641-6137-10 Inactive ingredients: tromethamine, hydrochloric acid, sodium hydroxide, water
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Sagent PharmaceuticalsSolution 50 mg/mL
Made by Gland Pharma
Product page on sagentpharma.com
How it looks, what’s in it, NDCs
50 mg/mL
Package NDC Carton of 50 mL 25021-798-02 Carton of 100 mL 25021-798-10 Inactive ingredients: water, tromethamine, hydrochloric acid, sodium hydroxide
Who sells it: FDA and Medicaid records, updated weekly. Each maker’s page, card and program is from its own site.
What to say at the pharmacy
“Before you fill my Cerebyx, can you tell me what I’d pay for the brand and for a generic?”
Paying cash? Ask for each one’s cash price. With insurance, ask what your plan charges for each.
What it’s used for
- Seizures that won’t stop (status epilepticus)
- Preventing and treating seizures during brain surgery
- In place of phenytoin by mouth, for a short time
What the FDA label says
CEREBYX is indicated for the treatment of generalized tonic-clonic status epilepticus and prevention and treatment of seizures occurring during neurosurgery. CEREBYX can also be substituted, as short-term use, for oral phenytoin. CEREBYX should be used only when oral phenytoin administration is not possible.
Source: the FDA label for Cerebyx (Pfizer Laboratories Div Pfizer Inc), August 28, 2025. Full label on DailyMed
Good to know
- A regular generic may look different from Cerebyx. The FDA requires it to work the same way.
- We didn’t find a savings card from Cerebyx’s maker.
- Don’t stop or change a medicine without talking to your pharmacist or prescriber.
Prices change: confirm with the pharmacy before you fill. drugalt.com/drug/cerebyx/