Dr. Kintanar has distinguished himself in the fields of pharmacology and environmental science through original researches that advanced the frontiers of knowledge in these fields. He investigated the mechanisms of fatty liver and hypolipidemia induced by orotic acid thus assisting in the clarification of the molecular mechanisms of lipo-protein biosynthesis. He also pioneered in the pharmacological screening of Philippine plants using multidimensional observation techniques.

In the 60's, Dr. Kintanar received the Burke Award for excellence in cardiovascular medicine and the Republic Heritage award. He also won First Prize in the Manila Medical Society research contest. The following decade he became recipient of the Ten Outstanding Young Men (TOYM) award for science, 1975; President Manuel A. Roxas Medallion for science; and First Prizes in the PMA-Abbot award and the 1979 NSDB Researcher of the Year. In 1981, Dr. Kintanar received the UP Alumni Association Professional Achievement award in science.