Company: MDCXW
Filing Date: 2025-09-29
Form Type: S-1
Source: 0001062993-25-015839
Chunk: 128

Company: Medicus Pharma Ltd.
Filing Date: 2025-09-29
Form: S-1
Chunk 128
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 all dose sites was abraded using adhesive tape. The patches were removed after 30 minutes. For the reference control (Group 5) animals, 2 saline control and 2 reference control patches (~0.2 ml/patch) were applied to the dose sites for 4 hours. Dose site skin was assessed at approximately 1, 4, 24 and 48 hours following patch removal for all groups.

All animals in groups 1 - 4 exhibited minimal-to-no dose-related erythema or edema. If erythema and edema were present, they were generally mild, with only a few observations of well-defined erythema. Severe skin irritation was observed on all the test sites (SLS) in group 5. These results demonstrate that the test article did not cause any pyrogenicity after subcutaneous injection or topical application at doses up to 200 μg/site.

14-Day Toxicity Study in the Yucatan Minipig

The objective of this study (SRC Study No. S15055) was to evaluate the local tissue tolerability, potential toxicity, skin irritation and systemic exposure after various dose levels delivered by D-MNA following three (3) topical dose administrations within two weeks on young Yucatan minipigs. The minipig data needs to be considered in the context of an unexpectedly high degree of dose variability. The variability in the minipig study was most likely the result of inconsistent delivery of doxorubicin from the microneedle array, possibly due to animal movement as the arrays were being applied.

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Following an acclimation period, a total of 30 minipigs (15 males and 15 females) were randomized into one of five treatment groups. Groups of 3 males and 3 females were treated with a blank control array (Group 1), and three dose levels of D-MNA at 25, 50 and 200 µg/dose of doxorubicin (Groups 2 - 4), respectively. An IV DXR group, consisting of 3 males and 3 females, served as a reference control (Group 5). Dosing occurred on Days 1, 7 and 14 with either control array or test article (Groups 1-4), and Group 5 was dosed intravenously on these same study days. Each topical treatment lasted 30 minutes. Each animal receiving topical treatment (Groups 1 - 4)