Phosphopantothenic acid is an amidoalkyl phosphate that is the 4-phosphate derivative of (R)-pantothenic acid. Phosphopantothenic acid is not permeable to cell membranes due to its anionic character, consistent with the observation that systemic administration of Phosphopantothenic acid does not restore CoA levels in cellular and mouse models

Monophosphothiamine is thiamine derivative used for the treatment of neuritis, polyneuritis, asthenic conditions (weakness), as an additional remedy for chronic blood circulation insufficiency, chronic gastritis accompanied by motor and secretory disorders functions of the stomach. Monophosphothiamine underwent metabolic phosphorylation to active metabolite thiamine pyrophosphate, that acts as a coenzyme in the different metabolic process.

Heidelberg Pharma Research developed fosalvudine tidoxil, a prodrug derived from the nucleoside reverse transcriptase inhibitor alovudine, for the treatment of HIV infections. This drug had reached phase II clinical trials before its development was discontinued.

Chromic Phosphate Cr-51 is a radiopharmaceutical compound that has been extensively used in nuclear medicine. When administered intraperitoneally, the particulate form of chromic phosphate is pocketed in various areas of the peritoneum, or filtered out by the first lymph nodes encountered, because of the too large particle size, whereas the colloidal form is carried over to the lymphatic system. The larger particles originally present in its size spectrum or formed in vivo by aggregation of smaller particles are trapped by the first line of lymph nodes, and the remainder goes into the thoracic duct, with posterior incorporation into the blood circulation and final removal by the reticuloendothelial system: liver, spleen and bone marrow.

Fozivudine tidoxil is a thioether lipid–Zidovudine (ZDV) conjugate. After intake it is split intracellularly into the lipid moiety and ZDV-monophosphate, which is subsequently phosphorylated to the active metabolite ZDV-triphosphate. The rationale behind the development of fozivudine (FZD) was to take advantage of the high cleavage activity in mononuclear cells and other organs resulting in increased amounts of intracellular ZDV available for phosphorylation to the active metabolite, and a very low activity in red blood and stem cells, which should result in reduced haematologic toxicity. It is member of the family of nucleoside reverse transcriptase (RT) inhibitors. Fozivudine tidoxil has been in Phase II clinical trials for the treatment of HIV infection. There were three adverse events possibly related to fozivudine: urine abnormality, gastrointestinal pain and abnormal dreams.