Hydroxycarbamid har for nylig vist sig at være forbundet med dannelsen af nitrogenoxid, hvilket indikerer, at nitrogenoxid stimulerer produktionen af cyklisk guanosin monophosphat (cGMP), som igen aktiverer en proteinkinase og øger produktionen af HbF.
Recently, hydroxycarbamide has shown to be associated with the generation of nitric oxide suggesting that nitric oxide stimulates cyclic guanosine monophosphatase (cGMP) production, which then activates a protein kinase and increases the production of HbF.