| Cover | Aug. 12, 2021 |
| Affiliate, Collateralized Security [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 12, 2021 |
| Entity File Number | 333-206903 |
| Entity Registrant Name | Citius Pharmaceuticals, Inc. |
| Entity Central Index Key | 0001506251 |
| Entity Tax Identification Number | 27-3425913 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 11 Commerce Drive |
| Entity Address, Address Line Two | 1st Floor |
| Entity Address, City or Town | Cranford |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07016 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common stock, $0.001 par value | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Common stock, $0.001 par value |
| Trading Symbol | CTXR |
| Security Exchange Name | NASDAQ |
| Warrants to purchase common stock | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Warrants to purchase common stock |
| Trading Symbol | CTXRW |
| Security Exchange Name | NASDAQ |
