The most successful commercial use of cocaine in the nineteenth century was a mixture of coca and wine.

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This is true. Coca wine was a popular commercial product in the 19th century, marketed as a tonic and stimulant. It was believed to have medicinal benefits and was even used by famous figures such as Thomas Edison and Queen Victoria. However, the addictive and harmful nature of cocaine eventually led to its banning in most countries.

The Most Successful Commercial Use of Cocaine in the Nineteenth