The best-selling drug Humira (adalimumab) now faces competition in the United States after a 20-year monopoly. The first adalimumab biosimilar, Amjevita, launched in the United States on January 31, and in July, seven additional biosimilars became available. These drugs have the potential to lower prescription drug prices, but when and by how much remains to be seen.
Here’s what you need to know about adalimumab biosimilars.
What Humira biosimilars are now available?
Eight different biosimilars have launched in 2023 with discounts as large at 85% from Humira’s list price of $6,922. A few companies also offer two price points.
Three of these biosimilars – Hadlima, Hyrimoz, and Yuflyma – are available in high concentration formulations. This high concentration formulation makes up 85% of Humira prescriptions, according to a report from Goodroot, a collection of companies focused on lowering health care costs.
Cyltezo is currently the only adalimumab biosimilar with an interchangeability designation, meaning that a pharmacist can substitute the biosimilar for an equivalent Humira prescription without the intervention of a clinician. A total of 47 states allow for these substitutions without prior approval from a clinician, according to Goodroot, and the clinician must be notified of the switch within a certain time frame. A total of 40 states require that patients be notified of the switch before substitution.
However, it’s not clear if this interchangeability designation will prove an advantage for Cyltezo, as it is interchangeable with the lower concentration version of Humira that makes up just 15% of prescriptions.
Most of the companies behind these biosimilars are pursuing interchangeability designations for their drugs, except for Fresenius Kabi (Idacio) and Coherus (Yusimry).
A ninth biosimilar, Pfizer’s adalimumab-afzb (Abrilada), is not yet on the market and is currently awaiting an approval decision from the Food and Drug Administration to add an interchangeability designation to its prior approval for a low-concentration formulation.
Why are they priced differently?
The two price points offer different deals to payers. Pharmacy benefit managers make confidential agreements with drug manufacturers to get a discount – called a rebate – to get the drug on the PBM’s formulary. The PBM keeps a portion of that rebate, and the rest is passed on to the insurance company and patients. Biosimilars at a higher price point will likely offer larger rebates. Biosimilars offered at lower price points incorporate this discount up front in their list pricing and likely will not offer large rebates.
Will biosimilars be covered by payers?
Currently, biosimilars are being offered on formularies at parity with Humira, meaning they are on the same tier. The PBM companies OptumRx and Cigna Group’s Express Scripts will offer Amjevita (at both price points), Cyltezo, and Hyrimoz (at both price points).
“This decision allows our clients flexibility to provide access to the lower list price, so members in high-deductible plans and benefit designs with coinsurance can experience lower out-of-pocket costs,” said OptumRx spokesperson Isaac Sorensen in an email.
Mark Cuban Cost Plus Drug Company, which uses a direct-to-consumer model, will offer Yusimry for $567.27 on its website. SmithRx, a PBM based in San Francisco, announced it would partner with Cost Plus Drugs to offer Yusimry, adding that SmithRx members can use their insurance benefits to further reduce out-of-pocket costs. RxPreferred, another PBM, will also offer Yusimry through its partnership with Cuban’s company.
The news website Formulary Watch previously reported that CVS Caremark, another of the biggest PBMs, will be offering Amjevita, but as a nonpreferred brand, while Humira remains the preferred brand. CVS Caremark did not respond to a request for comment.