Company: EDSA
Filing Date: 2025-02-26
Form Type: CORRESP
Source: 0001171843-25-001088
Chunk: 2

Company: Edesa Biotech, Inc.
Filing Date: 2025-02-26
Form: CORRESP
Chunk 2
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 Biotech, Inc.                     
 100 Spy Court, Markham, Ontario L3R 5H6 
 (289) 800-9600 |                        
 www.edesabiotech.com                    |

<div align='center'>Exhibit A</div>

The following table summarizes our research and development expenses incurred during the three
months ended March 31, 2025 and 2024, together with the dollar increase or decrease in those items:

| (In thousands)                           |     |   | Three Months Ended March 31, |     |   |      |     | Change |
|:-----------------------------------------|:----|:--|-----------------------------:|:----|:--|-----:|:----|:-------|
|                                          |     |   |                         2025 |     |   | 2024 |     | $      |
| Program-specific external costs:         |     |   |                              |     |   |      |     |        |
| EB06                                     |     | $ |                              |     | $ |      |     |        |
| EB05                                     |     |   |                              |     |   |      |     |        |
| Other development and discovery programs |     |   |                              |     |   |      |     |        |
| Total program-specific costs             |     |   |                              |     |   |      |     |        |
| Non-program specific external costs      |     |   |                              |     |   |      |     |        |
| Unallocated internal costs               |     |   |                              |     |   |      |     |        |
| Compensation and related personnel costs |     |   |                              |     |   |      |     |        |
| Other expenses                           |     |   |                              |     |   |      |     |        |
| Total unallocated internal costs         |     |   |                            — |     |   |    — |     | —      |
| Total research and development costs     |     |   |                            — |     |   |    — |     | —      |

The following table summarizes our research and development expenses incurred during the six
months ended March 31, 2025 and 2024, together with the dollar increase or decrease in those items:

| (In thousands)                           |     |   | Six Months Ended March 31, |     |   |      |     | Change |
|:-----------------------------------------|:----|:--|----------------