People also allegedly fainted during the 1925 film "The Phantom of the Opera" when they saw Lon Chaney's makeup. There's a few other points in history as well when movies promoted that people had fainted during them.

Also on the topic of audience reaction - in the trivia section it says that 7 Scotsmen had fainted during a screening of Horror Chamber Of Dr Faustus back in the day my point being how is it even possible to faint watching a goddamn movie? Hells the matter with them? Or maybe thats just stories
and we know stories are stories
in this case, the same thing
stories that grew out of imagination
theres no proof that anything bad ever happened around this film
Right.
"facts are stupid things" - Ronald Reagan

Marlowe's was not the best-known version of the Faust story, which started as a German chapbook in the late 16th century. Marlowe fans are hardly a major target group for horror films, or anything else. Goethe wrote the best-known version, but there were many others.
https://en.wikipedia.org/wiki/Faust

The title is lurid. But I've seen it and it's actually one of the best US versions of a Euro horror of the era. There is barely any editing and the dubbing is quite good. They shorten the surgery scene and cut the scene with the boy in the hospital. Otherwise, it's all there. They retain the music and the dubbing voices are quite similar to their original French counterparts.

Perhaps it's too late for you to regain trust in adults, but believe me, not all adults lie!
Jan Svankamer called one of his movies
Faust
and he dared to make it really about Dr. Faustus!
This world is a comedy to those that think, a tragedy to those that feel.

I just worry about all those young Marlowe fans who were lured in under false pretenses to a movie that had nothing to do with Faustus. No wonder my generation grew up not trusting grown-ups.

When the film failed to draw crowds under its original title, however, the distributors decided to exploit it as a two-bit "scare" flick with the new title The Horror Chamber of Dr. Faustus
~ Hal Erickson, All Movie Guide
That was part of the description on Blockbuser.com