Indicated for Low fever, Dizziness, Head cold, Sleeplessness, Sore throat. Ferrum phosphoricum is a homeopathic remedy most commonly used in the first stage of fevers especially in upper respiratory complaints. Patients needing this remedy are often worse at night and 4 to 6 pm, from touch, jar, motion, and on the right side and better from cold applications. This homeopathic remedy is a mineral remedy. Active ingredient: Ferrum phosphoricum [HPUS]. Inactive ingredients: Sucrose/lactose pellets.