In addition, she was addicted to alcohol and prescription pain killers and tranquilizers. She was treated at the Betty Ford Center for seven weeks from December 1983 to January 1984, becoming the first celebrity to openly admit herself to the clinic. She relapsed later in the decade, and entered rehabilitation again in 1988. Taylor also struggled with her weight – she became overweight in the 1970s, especially after her marriage to Senator John Warner, and published a diet book about her experiences, "Elizabeth Takes Off" (1988). Taylor was a heavy smoker until she experienced a severe bout of pneumonia in 1990.