தஞ்சை தமிழ்ப்பல்கலைக்கழக அருங்கலைச்சொல் அகரமுதலி

Others have used`vediya` in place of `rasayana`.However,rasayana is more in currency and readily intelligible.

கீமோதெராபி சில குறிப்பிட்ட நச்சு ரசாயன பொருள்கள் மூலமாக கேன்ஸர் போன்ற வியாதிகளைக் குணப்படுத்தும் முறையாகும்.ஆகவே ரசாயன மருத்துவ சிகிச்சை என்றோ அல்லது தூய தமிழில் வேதி மருத்துவ சிகிச்சை என்றோ மொழிபெயர்க்கலாம்

Chemotherapy, in its most general sense, refers to treatment of disease by chemicals[1] that kill cells, both good and bad, but specifically those of micro-organisms or cancer.
http://en.wikipedia.org/wiki/Chemotherapy

chemotherapy involves the use of drugs to destroy cancer cells. Although an ideal drug would destroy cancer cells without harming normal cells, most drugs are not that selective. Instead, drugs are designed to inflict greater damage on cancer cells than on normal cells, typically by using drugs that affect a cell's ability to grow. Uncontrolled and rapid growth is characteristic of cancer cells. However, because normal cells also need to grow, and some grow quite rapidly (such as those in the bone marrow and those lining the mouth and intestine), all chemotherapy drugs affect normal cells and cause side effects