| Cover | Jan. 11, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 11, 2023 |
| Entity File Number | 000-53855 |
| Entity Registrant Name | PEAK PHARMACEUTICALS, INC. |
| Entity Central Index Key | 0001452804 |
| Entity Tax Identification Number | 26-1973257 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 14201 N. Hayden Road |
| Entity Address, Address Line Two | Suite A-1 |
| Entity Address, City or Town | Scottsdale |
| Entity Address, State or Province | AZ |
| Entity Address, Postal Zip Code | 85260 |
| City Area Code | 480 |
| Local Phone Number | 659-6404 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Information, Former Legal or Registered Name | Not Applicable |
