Rostislav Raykov
Analyst · Cantor Fitzgerald
Thank you, Robert, and good morning, everyone. On today's call, we will detail our first quarter financial results, all of which were outlined in our earnings press release issued this morning prior to this call. We'll also discuss ongoing commercial launch efforts and progress that we're making with PEDMARK in the U.S. and abroad, following the exclusive licensing agreement announcement we executed in March with Norgine to commercialize PEDMARQSI in Europe, Australia and New Zealand.
In the first quarter, PEDMARK delivered total net revenues of $25.4 million, including $18 million in licensing revenues from Norgine transaction and $7.4 million in net PEDMARK product sales. Robert will further elaborate on the $18 million in the licensing revenue related to the Norgine transaction. But to be clear, we received $43.2 million from the transaction which is reflected on our balance sheet as of March 31 and cash of $51.2 million. We believe that a couple of things affected PEDMARK sales during the first quarter of this year.
First, the public reminder that the U.S. FDA issued to health care professional organizations in January, stating that PEDMARK is not substitutable with other sodium thiosulfate products may have caused some unintended confusion in the marketplace. Initially, the professional affairs and stakeholder engagement staff at the FDA issued the potential health risks with substitution as a targeted outreach to the following organizations. Alliance for Pharmacy Compounding, American Academy of Pediatrics, American College of Apothecaries, American Hospital Association, American Pharmacies Association, American Society of Medical Oncology, American Society Health System Pharmacies, Association of American Cancer Institute, [ Junior Doctors ] Association, Federation of American Hospitals, Hematology Oncology Pharmacy Association, International Academy of Compounding Pharmacies and Professional Compounding Centers of America.
We believe that, in turn, some of these organizations communicated the FDA safety message to their respective members. Recently, the office of new drugs and the FDA added the safety communication issued by SEDAR's professional affairs and stakeholder engagement staff to PEDMARK's approval in the FDA page. Now it is clear that substitution post potential health risks, including potassium chloride exposure, which at high doses can lead to increased risk of acute cardiac events and other serious adverse reactions, potassium chloride is not present in PEDMARK.
Overexposure to boric acid can cause health risks, including headache, hypothermia, restlessness, weakness, renal injury, dermatitis, alopecia, anorexia and indigestion. Although PEDMARK also contains boric acid, it is at a lower concentration than other STS products. Overexposure to sodium nitrate, which can lead to health risks, including methemoglobinemia. Sodium nitrate is called co-packaged with sodium thiosulfate as a separate vial in some products, and it's not presently in PEDMARK.
Unfortunately, Fennec continues to see unlawful compounding of copies of PEDMARK with pediatric hospital pharmacies, are necessarily putting costs in front of children's safety. The majority of the hospitals are affiliated with Children Oncology Group and thus far, the FDA safety communication has not changed their behavior. Fennec continues to diligently work with the FDA to address this issue.
Additionally, prior to April 1 of this year, our J-Code did not differentiate between PEDMARK and other formulations of STS. As a consequence, which we discussed in our call last quarter, there has been some confusion and some impact to the adaptation of PEDMARK. The good news is that as of April 1, this issue has been fully resolved with CMS amending our J-Code specified PEDMARK. Now that this change is effective, we expect uptake to improve in the quarters to follow.
Despite the acute challenges, we remain optimistic that it will be an exciting year for Fennec given the strong performance with PEDMARK in 2023, the first full fiscal year following our U.S. commercial launch. We're confident in our ability to navigate through these marketplace challenges to achieve our long-term objectives. Our outlook over the next few quarters will largely depend on our ability to successfully target the community hospital infusion centers that treat in the outpatient setting all the pediatric patients within our label and the NCCN guidelines for adolescents and young adults.
PEDMARK continues to have broad and favorable payer coverage, as evidenced by payer approval, approved U.S. prescription claims with commercial insurance plans and Medicare Part B plans. Regarding our partnership with Norgine to commercialize PEDMARQSI in Europe, Australia and New Zealand, efforts are well underway in these territories with a targeted launch date fourth quarter this year. PEDMARQSI is the first and only approved therapy in the EU and U.K. for prevention of ototoxicity induced by cisplatin chemotherapy in patients 1 month to 18 years of age with localized non-metastatic solid tumors.
As a reminder, under the terms of the licensing agreement, Fennec received approximately $43.2 million in upfront consideration and the potential of up to approximately $230 million in additional commercial and regulatory milestone payments and tiered royalties on net sales of PEDMARQSI in the license territories up to the mid-20s. Norgine will be responsible for all commercialization activities in the licensed territories and will hold all marketing authorizations. As we previously communicated, this partnership represents an important step in achieving our mission of expanding PEDMARQSI to patients across the globe who are at risk of suffering from cisplatin-induced ototoxicity. The terms provided this week -- many important benefits, including an upfront payment, further solidifying our balance sheet [indiscernible] providing meaningful participation in the ex-U.S. success of PEDMARQSI, and importantly, an experienced partner to successfully launch PEDMARQSI in the licensed territories.
With that, I will now turn the call over to Adrian, who will provide an update on our commercial strategy and operations. Adrian?