Company: SCLXW
Filing Date: 2025-11-14
Form Type: 424B3
Source: 0001193125-25-283322
Chunk: 83

Company: Scilex Holding Co
Filing Date: 2025-11-14
Form: 424B3
Chunk 83
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, dexamethasone sodium phosphate viscous gel), a novel, viscous gel formulation of a widely used corticosteroid for epidural injections to treat lumbosacral radicular pain or sciatica with the second Phase 3 study initiated in September 2025, (ii) SP-103 (lidocaine topical system) 5.4% (“SP-103”), a Phase 2, next-generation, triple-strength formulation of ZTlido, for the treatment of chronic neck pain associated with muscle spasms and for which we have completed a Phase 2 trial in acute low back pain (“LBP”), and (iii) SP-104 (4.5 mg, low-dose naltrexone hydrochloride delayed-release capsules) (“SP-104”), a novel low-dose delayed-release naltrexone hydrochloride formulation for treatment of fibromyalgia, for which Phase 1 trials were completed.

SEMDEXA has been granted fast track designation by the FDA and, if approved, could become the first FDA-approved alternative to off-label epidural steroid injections, which are administered over 12 million times annually in the United States. We have completed a pivotal Phase 3 study with final results received in March 2022, which results

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reflected achievement of primary and secondary endpoints, and initiated the second Phase 3 study in September 2025. SP-103 has also been granted fast track designation by the FDA for LBP. We received our SP-103 Phase 2 top-line results in August 2023 and the trial achieved its objectives characterizing safety, tolerability and preliminary efficacy of SP-103 in acute LBP associated with muscle spasms. SP-103 was safe and well tolerated. Increase of lidocaine load in topical system by three times, compared with approved ZTlido, 5.4% vs. 1.8%, did not result in signs of systemic toxicity or increased application site reactions with daily applications over one month treatment. We will continue to analyze the SP-103 Phase 2 trial data along with an investigator study of ZTlido in patients with neck pain completed in the second half of 2023, which also has shown promising top-line efficacy and safety results. SP-103, if approved, could become the first FDA-approved lidocaine topical product for the treatment of chronic neck pain associated with muscle spasms. SP-103 is a triple-strength lid