Enflonsia

Generic name: clesrovimab

Used for: Preventing RSV lung disease in babies

How do you pay?

How to pay the least

Ask for the cash price

Enflonsia

Enflonsia 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 Enflonsia’s cash price, and one or two other pharmacies too.

Compare every option

Question
Brand nameEnflonsia
Authorized genericclesrovimab
Regular genericclesrovimab
What you’d pay
Cash priceAsk the pharmacy
Not soldThere isn’t one
Not soldAsk the pharmacy
Same as Enflonsia?
The original
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Brand nameNo maker’s card

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

Authorized genericNot sold

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

Regular genericNot sold

Enflonsia 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 Enflonsia’s cash price, or your plan what it charges.

What it’s used for

What the FDA label says

ENFLONSIA is a respiratory syncytial virus (RSV) F protein-directed fusion inhibitor indicated for the prevention of RSV lower respiratory tract disease in neonates and infants who are born during or entering their first RSV season.

Source: the FDA label for Enflonsia (Merck Sharp & Dohme LLC), June 20, 2025. Full label on DailyMed 

Good to know

Prices change: confirm with the pharmacy before you fill. drugalt.com/drug/enflonsia/