Company: MDCXW
Filing Date: 2025-11-19
Form Type: S-1
Source: 0001062993-25-016962
Chunk: 95

Company: Medicus Pharma Ltd.
Filing Date: 2025-11-19
Form: S-1
Chunk 95
---
 the required number of days have lapsed without objection from the applicable regulatory authority. (In certain jurisdictions, a no objection letter or approval may be required before the clinical trial can proceed). In the United States, this application is called an investigational new drug study, or "IND", and in Canada and most European countries, a clinical trial application, or "CTA."

For the United States, the sponsor of the study must submit the results of the non-clinical tests, manufacturing information, analytical data and available clinical data or literature, within the IND, to the FDA. Some information may be omitted from the IND in instances where prior FDA findings of safety or efficacy of a drug product are being relied upon. Even once the IND is submitted, non-clinical testing may continue to occur. An IND becomes effective automatically 30 days after receipt of the document by the FDA, unless within that time the FDA raises concerns or questions, in which case a clinical hold may be put in place until the concerns are adequately addressed by the study sponsor with the FDA.

Two key factors influencing the rate of progression of clinical trials are the rate at which patients can be enrolled to participate in the research program and whether effective treatments are currently available for the disease that the drug is intended to treat. Patient enrollment is largely dependent upon the incidence and severity of the disease, the treatments available and the potential side effects of the drug to be tested and any restrictions for enrolment that may be imposed by regulatory agencies. For further information see "Risk Factors."

<div align='center'>61</div>

Phase 1 clinical trials are typically conducted, on a small number of individuals (healthy volunteers or patients), to determine safety, dose limiting toxicities, tolerability, pharmacokinetics and to determine dose ranging for Phase 2 clinical trials in humans.

Phase 2 clinical trials typically involve a larger patient population than is required for Phase 1 and are conducted to evaluate the safety and efficacy of a drug candidate in patients having the disease for which the drug is indicated. This phase also serves to identify possible common short-term side effects and risks.

Phase 3 clinical trials typically involve tests in a much larger population of patients suffering from the targeted condition or disease. These studies involve controlled and/or uncontrolled testing in an expanded patient population (several hundred to several thousand patients) at geographically dispersed test sites to establish clinical safety and effectiveness. These trials also generate information from which the overall risk-benefit relationship relating to the drug can be determined.

Marketing Application

Upon successful completion of