Indicated for Irritability, Exhaustion, Lethargy, Mental fatigue, Weakness. Kali phosphoricum is a homeopathic remedy commonly used for patients who are prostrated, weak and tired from excitement, overwork and worry. Other indications - the patient is very nervous, starts easily and is irritable. The homeopathic remedy Kali phosphoricum is a mineral remedy. Active ingredient: Kali phosphoricum [HPUS]. Inactive ingredients: Sucrose/lactose pellets. All single remedies are made and packaged in glass.