Abstract: Compositions and methods of use for treatment of Long Covid, or other post-viral or other post-infection conditions that result in a toxin induced thickened blood pulp condition (e.g., including but not limited to influenza, zika, herpes, or epstein-barr viruses). The treatment composition includes C29H40N2O4; C9H2N2; and/or C28H38N2O4; and optionally a source of iron. A filler (e.g., CaCO3) or pharmaceutically acceptable carrier may be provided. In the treatment method, treatment composition is administered to a patient, specifically because of the patient's exhibition of symptoms of Long Covid (or other contemplated post-viral or other post-infection condition). The treatment composition can be administered as a single dose. The components thereof have a molecular and/or particle size sufficiently small so as to not induce vomiting, and the single dose administration to the patient is sufficient so that the patient's Long Covid symptoms are relieved within a period of about 10 days.