what's the meaning of drink- and drug-fuelled in this paragraph?

He was losing human form. He crawled
on all fours, and yelled out drink- and drug-fuelled
animal howls and yaps and yelps.

susan2016-11-05T03:32:25Z

The howling, yapping and yelling were because he was drunk and on drugs.

Replace the word "fueled" with "caused" and you can understand the sentence better.