He also has done research with the Scripps Clinic Viterbi Family Sleep Center. Dr. Kripke was elected a Fellow of the American Psychiatric Association, co-authored hundreds of medical articles and has given invited lectures in 18 countries. In 1973, Dr. Kripke established one of the first sleep clinics in the United States. He treated patients with sleep disorders until retirement from his clinical practice at age 70. Dr. Kripke continues to be active as a researcher and as an advocate for raising awareness of the dangers associated with sleeping pills, particularly hypnotic drugs.