Ever since biosimilar competition to AbbVie Inc.'s Humira (adalimumab) began to hit the US market in early 2023, all eyes have been on the uptake of off-patent rivals, given that the product represented the largest loss-of-exclusivity opportunity in history – valued at roughly $17bn in terms of brand sales.
Despite the excitement around the launches – which saw Amgen compete with the first US biosimilar in January 2023, followed...