||Normally, coca leaves are illegal in the United States. The exception to this is if the leaves have been decocainized, a process which removes all the cocaine and ecgonine from them. The main use of these decocainized leaves is to flavor Coca-Cola. Coca tea would be illegal in the US except if it is made from decocainized leaves.|
Here is the quote from US Federal Schedules:
"Coca leaves (9040) and any salt, compound, derivative or preparation of coca leaves (including cocaine (9041) and ecgonine (9180) and their salts, isomers, derivatives and salts of isomers and derivatives), and any salt, compound, derivative, or preparation thereof which is chemically equivalent or identical with any of these substances, except that the substances shall not include decocainized coca leaves or extraction of coca leaves, whhch extractions do not contain cocaine or ecgonine."