How do you pay?

How to pay the least

Ask for the cash price

Loargys

Loargys is a biologic. Biologics don’t have generics, but some have biosimilars or an unbranded version from the same maker. Ask your pharmacist or prescriber whether one is sold.

  1. Ask your pharmacy for Loargys’s cash price, and one or two other pharmacies too.

Compare every option

Question
Brand nameLoargys
Authorized genericpegzilarginase-nbln
Regular genericpegzilarginase-nbln
What you’d pay
Cash priceAsk the pharmacy
Not soldThere isn’t one
Not soldAsk the pharmacy
Same as Loargys?
The original
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Brand nameNo maker’s card

We didn’t find a savings card or cash price from Loargys’s maker. Ask the pharmacy for Loargys’s cash price. With insurance, ask what your plan charges.

Authorized genericNot sold

There isn’t one. An authorized generic is Loargys itself, from the same company, sold without the brand name, and usually for less. For now Loargys is the only choice; ask the pharmacy for its cash price, or your plan what it charges.

Regular genericNot sold

Loargys is a biologic. Biologics don’t have generics, but some have biosimilars or an unbranded version from the same maker. Ask your pharmacist or prescriber whether one is sold. Generics usually come once the brand’s patents and exclusivity end. Until then, ask the pharmacy for Loargys’s cash price, or your plan what it charges.

What it’s used for

What the FDA label says

LOARGYS is an arginine specific enzyme indicated for the treatment of hyperargininemia in adult and pediatric patients 2 years of age and older with Arginase 1 Deficiency (ARG1-D), in conjunction with dietary protein restriction.

This indication is approved under accelerated approval based on reduction of plasma arginine. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial.

Source: the FDA label for Loargys (Immedica Pharma US Inc.), February 23, 2026. Full label on DailyMed 

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