Did people in the United States drink more alcohol after it became legal in 1933? Or was it the same? And how was it before it become illegal to drink in 1920?
Alcohol consumption increased after 1933 for at least two reasons, as shown in a graph put up by another poster.
There was a lot of "pent up demand" on the part of people who wanted to drink during the 1920s but was afraid to, because of the law.
Women had "learned" to drink in large numbers during the 1920s. That's because women accompanied men (initially as chaperones, later as customers in their own right) to "speakeasies" that technically were not drinking establishments, because they were unlicensed before Prohibition. This was particularly true for wine, less so for other forms of liquor.