As shortage continues, price hike brings yet another hit
The first reports of fludarabine being in short supply surfaced about a year ago. According to a Nov. 2 update from the American Society of Health-System Pharmacists, five companies now manufacture fludarabine, and all of them report shortages. Areva, which dramatically raised its price, is accepting direct orders. Leucadia and Teva don’t know when the drug will be available; and Fresenius Kabi and Sagent expect availability in early 2023.
Areva, Leucadia, and Teva didn’t provide reasons for their shortages. Fresenius Kabi blamed increased demand, and Sagent pointed to manufacturing delays. Pfizer, another manufacturer, had a tiny market share and stopped making fludarabine in 2020, according to the pharmacist society.
In a May 12 press release, a company called Lannett announced it would take over U.S. distribution of fludarabine for Areva and suggested that the supply shortage would be lucrative: “While total U.S. sales for the 12 months ended March 2022 of Fludarabine Phosphate for injection, USP, 50 mg/2mL were approximately $4.9 million, according to IQVIA, the current market value is believed to be higher due to the recent market disruptions.”
“We were all shocked and outraged when Areva came out with the new, dramatically higher prices,” Bill Greene, PharmD, chief pharmaceutical officer at St. Jude Children’s Research Hospital, said in a recent interview.
In a prior interview, conducted during the summer of 2022, Dr. Greene addressed the topic of hematologic drug shortages. Back then he noted that he was seeking emergency supplies of fludarabine, since all five manufacturers reported having no stock available.
Interviewed again in November 2022, Dr. Greene noted that the hospital “had been able to stay ahead of the need and meet the needs of our patients” through arrangements with Teva and Fresenius Kabi. “In cases of patient need, we certainly are willing to pay a higher product price if that’s what it takes to get it – assuming the product is a quality product.”
The Medical College of Wisconsin’s Dr. Shah said insurers may refuse to cover the higher price, sticking medical institutions with the bill.
Alternatives abound, but do they suffice?
There is some good news on the fludarabine shortage front. Areva recently alerted providers that it was releasing fludarabine from non-FDA-approved suppliers with the agency’s permission, and Accord Healthcare said it received permission to sell fludarabine that was marketed in Canada.
Another option – oral fludarabine instead of the standard IV version – remains unavailable in the United States. According to the June letter to the FDA from the American Society for Transplantation and Cellular Therapy and National Marrow Donor Program, it “might be an appropriate alternative” and is available in Europe, Canada and Australia.
The letter warns that “transplant centers have also been forced to move away from fludarabine-based regimens and use alternative drugs such as cladribine or clofarabine, which are both significantly less studied and rely on single-center experience or limited phase II data. ... The limited availability of fludarabine is leading to the use of alternative regimens that are known to be more toxic or understudied alternatives with unknown long-term clinical effects or harms to patients.”
In a November 2022 report published in Transplantation and Cellular Therapy, Dr. Shah and colleagues noted that institutions are adopting strategies such as “(1) pharmacy dose banding and rounding down to save vials, even if a >5% reduction was required; (2) administering all dosing of fludarabine based not on actual body weight but on adjusted body weight; and (3) switching the billing of fludarabine from single-dose vials to billing by dose delivery.”
If the shortage continues, “it becomes necessary for centers to establish algorithms for management now,” they wrote. “Substitution of such agents as bendamustine and cladribine can be considered ... [and] another acceptable solution could be the substitution of clofarabine for fludarabine.”
Still, there are many unanswered questions. “The challenge is that these alternative regimens have not been extensively studied in a large population,” Dr. Shah said. “You have to be more mindful of potential side effects and risks, and the biggest concern is efficacy. Is changing the drug going to be detrimental to a patient’s outcome? To be honest, we don’t know the answer to that.”
Dr. Mato disclosed ties with TG Therapeutics, Pharmacyclics, AbbVie, Acerta, Adaptive Biotechnologies, AstraZeneca, BeiGene, BioPharma, BMS, Curio, Dava, DTRM, Genentech, Genmab, Janssen, Johnson & Johnson, LOXO, Medscape, Nurix, Octapharma, PER, PerView, and Pfizer. Dr. Greene and Dr. Shah have no disclosures.