He then studied at the Karolinska Institutet under professor Nils-Åke Hillarp, studying monoamine neurons, getting his Doctor of Philosophy in 1968 and his Doctor of Medicine in 1971.
He was linked to the Department of Neuroscience and is specialized in cell biology. He enrolled in the Karolinska Institutet in 1960 and got his Bachelor in Medicine in 1960. He became an assistant professor in 1968, and from 1979 until 2006, Hökfelt worked as a professor at the Karolinska Institute.
National Academy of Sciences. Royal Swedish Academy of Sciences]
He was also a faculty member of the Department of Biotechnology at the Royal Institute of Technology in Stockholm. 2000: Foreign member of the Chinese Academy of Sciences
Honorary Member of the American Physiological Society.