How do you pay?

How to pay the least

Ask for the cash price

Koselugo

We didn’t find one.

  1. Ask your pharmacy for Koselugo’s cash price, and one or two other pharmacies too.
  2. Koselugo’s savings card works only with insurance from a job or one you bought.

Compare every option

Question
Brand nameKoselugo
Authorized genericselumetinib
Regular genericselumetinib
What you’d pay
Cash priceAsk the pharmacy
Not soldThere isn’t one
Not soldNone found
Same as Koselugo?
The original
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–

Brand nameThe maker’s card

Alexion Koselugo CoPay Program (OneSource)

Savings card from Alexion (AstraZeneca Rare Disease)

No insuranceNeeds insuranceNo cash price listed.
Insurance $0

Sign up on alexiononesource.com 

See the offer on alexiononesource.com

From the maker’s offer on alexiononesource.com, checked November 2, 2026. Co-pay cards can’t be used with Medicare (including Medicare Advantage), Medicaid, TRICARE or VA.

Maker’s card or discount card?

A discount card like GoodRx lowers the pharmacy’s cash price, but for a brand-name drug that price often stays high. Compare it with the maker’s card above. You can usually use one or the other on a fill, not both.

Authorized genericNot sold

There isn’t one. An authorized generic is Koselugo itself, from the same company, sold without the brand name, and usually for less. For now Koselugo is the only choice; its maker’s savings card can lower what you pay.

See the brand name →

Regular genericNot sold

We didn’t find one. Generics usually come once the brand’s patents and exclusivity end. Until then, the maker’s savings card is the way to pay less.

See the brand name →

What it’s used for

What the FDA label says

KOSELUGO is a kinase inhibitor indicated for the treatment of adult and pediatric patients 1 year of age and older with neurofibromatosis type 1 (NF1) who have symptomatic, inoperable plexiform neurofibromas (PN).

Source: the FDA label for Koselugo (AstraZeneca Pharmaceuticals LP), May 26, 2026. Full label on DailyMed 

Good to know