Pemberton made an improvement to Vin Mariani by adding kola nuts, another ingredient known for its medical properties. He advertised his drink as a nerve tonic, and an aid to overcome morphine addiction. In Pemberton's best interest, he decided to change the alcohol based drink, due to current attitudes towards alcohol. Alcohol would soon become illegal with the alcohol prohibition in 1920. Pemberton was convinced that the virtues of his drink were the coca leaves and kola nuts. By using these ingredients he focused on a new medical drink. He replaced the wine with essential oils, but the drink was too bitter. He added sugar to sweeten it, but it became too sweet. He decided to add citric acid to counterbalance the overwhelming sweet flavor. His efforts paid off, and he invented a new product. He soon launched Pemberton Chemical Company in partnership with Frank Robinson.

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