Calcipotriol monohydrate is a pharmaceutical compound used in the treatment of psoriasis, a chronic inflammatory skin condition. It is a synthetic form of vitamin D3, known as a vitamin D analog. Calcipotriol monohydrate works by regulating the growth and development of skin cells, reducing their excessive proliferation and inflammation, which are characteristic of psoriasis. It is typically applied topically as a cream, ointment, or solution to the affected areas of the skin. Calcipotriol monohydrate should be used as directed by a healthcare professional, and the frequency and duration of application may vary depending on the severity of the condition. Common side effects may include skin irritation, redness, and itching. It is important to follow proper application techniques and avoid excessive exposure to sunlight or artificial UV radiation during treatment with calcipotriol monohydrate.