Imunovir or Inoprinosine is a combination of inosine and DiMethylAminoIsoPropanol (DMAIP). I took Inosine in combination with DMAE (DiMethylAminoEthanol) with good effects, averaging at most $0.70 USD/day or about $21.00/month. (Source Naturals and Ultimate Nutrition Inosine 1000 - 2000 mg/day, and Source Naturals DMAE 351-702 mg/day. The Inosine is about $20 for (120) 500mg tablets, and DMAE is about $20 for (200) 351 mg tablets) DMAIP and DMAE are both amino alcohols, similar but not identical. Propanol is propyl alcohol, or propan-1-ol for CH3CH2CH2OH, propan-2-ol for CH3CH(OH)CH3. Ethanol is C2H5OH. Both Inosine and DMAE are available without a prescription in the USA and on the internet. Some CFS patients cannot tolerate DMAE until other processes work, so if you are willing to experiment, start slow. I took Inosine first at two different times for 2-3 months each with a slight improved feeling, then added DMAE in later and took both for about a year. After adding in DMAE I noticed a big increase health.