(1966) Ray Charles - I Don't Need No Doctor
(1966) Ray Charles - Let's Go Get Stoned

By 1964 Charles's drug addiction caught up with him and he was arrested for possession of marijuana and heroin. Following a self-imposed stay[38] at St. Francis Hospital in Lynwood, California, Charles received five years' probation. Charles responded to the saga of his drug use and reform with the songs "I Don't Need No Doctor", "Let's Go Get Stoned", and the release of his first album since having kicked his heroin addiction in 1966, Crying Time.[39][40]Source

(1965) The Coasters - Let's Go Get Stoned

"Let's Go Get Stoned" is an R&B song originally recorded by The Coasters in May 1965.[1] It was written by Nickolas Ashford, Valerie Simpson, and Josephine Armstead.

It was a 1966 #1 R&B hit for music legend Ray Charles.[2] The single was released shortly after Charles was released from rehab after a sixteen-year heroin addiction. It is notable for being one of Ashford & Simpson's first successful compositions together; the duo also penned Charles' "I Don't Need No Doctor"[3] before they signed with Motown Records working primarily on duets for Marvin Gaye & Tammi Terrell.Source

(1969) Big Mama Thornton - Let's Go Get Stoned

Willie Mae "Big Mama" Thornton (December 11, 1926 – July 25, 1984) was an American rhythm and blues singer and songwriter. She was the first to record the hit song "Hound Dog" in 1952.[1] The song was #1 on the Billboard R&B charts for seven weeks in 1953.[2] The B-side was "They Call Me Big Mama," and the single sold almost two million copies.[3] Three years later, Elvis Presley recorded his version, based on a version performed by Freddie Bell and the Bellboys. In a similar occurrence, she wrote and recorded "Ball 'n' Chain," which became a hit for her.[1] Janis Joplin later recorded "Ball and Chain," and was a huge success in the late 1960s.[4]Source

Yoinked.

(1971) Bill Cosby - Introduction - Downers And Uppers
(1971) Bill Cosby - Questions and Answers
(1971) Bill Cosby - Dope Pusher
(1971) Bill Cosby - I Found a Way Out
(1971) Bill Cosby - Bill Talks about Hard Drugs
(1971) Bill Cosby - Order in the Classroom
(1971) Bill Cosby - People Make Mistakes
(1971) Bill Cosby - I Know I Can Handle It
(1971) Bill Cosby - Talks to Kids About Pushers/Captain Junkie
(1971) Bill Cosby - Bill and the Kids Sing/Closing

Bill Cosby Talks to Kids About Drugs (1971) is an album by Bill Cosby. Unlike most of his recordings, this is not a full-fledged comedy album, but rather a record intended for children to school them on the dangers of drugs through songs and dialogue. It won the Grammy Award in 1972 for Best Recording for Children.

The album was available for some time to download free on Waxy.org. Cosby's lawyers eventually had the album download removed via cease and desist letter.[1][2]Source

(1971) THX 1138

THX 1138 is a 1971 science fiction film directed by George Lucas in his directorial debut. The film is written by Lucas and Walter Murch. It stars Robert Duvall and Donald Pleasence and depicts a dystopian future in which the populace is controlled through android police officers and mandatory use of drugs that suppress emotion, including sexual desire.

Edit: using DML's recommended poster

http://2.bp.blogspot.com/-k9nCuMdOKn0/TtcOZh9b7iI/AAAAAAAAAws/yV0BtAvMYhU/s1600/THX+1138+IMAGE+3.jpg

Check out this THX 1138 movie poster - very drugwar related.

Four Decades of Ignorance: The 40th Anniversary of the National Commission on Marijuana

Keith Stroup discusses some history surrounding the Schaffer commission.