The phrase "large amount of alcohol" is correct and usable in written English.
You can use it when you want to refer to a large quantity of alcoholic beverages. For example, "After a long day at work, Toni came home and drank a large amount of alcohol."
She had been drinking vodka and was highly intoxicated after consuming a large amount of alcohol.
As in the 1997 incident, the large amount of alcohol consumed by virtually all the witnesses made it difficult to prosecute anyone.
Claudia Haider was said to be highly sceptical of Austrian pathologists' conclusions that the 58-year-old politician had consumed such a large amount of alcohol in such a short space of time.
Janis Joplin's death – from an overdose of heroin combined with a large amount of alcohol – secured her place in the pantheon of self-destructive rock stars, though there is more to her story than that.
The 43-year-old suspect drank a large amount of alcohol, and made several statements about wanting to kill herself.
But he did warn, "It's possible to have such a large amount of alcohol it becomes toxic to the system".
In addition to the risk of alcoholism, persons who consume large amounts of alcohol are at increased risk for depressive symptoms.
Marshall and colleagues (2013) assessed BBB integrity by tracking a protein (i.e., albumin) that cannot cross an intact BBB in rats that were administered large amounts of alcohol for 4 days (a regimen that can induce alcoholic brain damage).
"Large number of dinners and large amounts of alcohol, that would worry me," says Blair.
"In order to tolerate George I need to consume large amounts of alcohol," she fires back.
Writer struggles to finish his repeatedly rejected plays, aided and impeded by large amounts of alcohol.
