Was Lewis Carroll inspired by hallucinations during a fever to write Alice in Wonderland?

While Lewis Carroll did suffer from hallucinations during a bout of severe illness as a child, there is no evidence that these experiences directly inspired the creation of Alice in Wonderland.

Carroll's inspiration for the story came primarily from his interactions with the Liddell sisters, especially Alice Liddell, during boating excursions on the River Thames in Oxford, England. It was during one such trip that Carroll told Alice the story that would later become Alice's Adventures in Wonderland.

Carroll did have a vivid imagination and was known for his interest in dreams, wordplay, and the exploration of the nonsensical. However, there is no indication that his hallucinations played a direct role in the development of Alice in Wonderland.