Darna and her friends get kidnapped off the street by a bad gang. Darna obviously is in her normal state. The girls get chloroformed, and Darna doesn’t have enough time to say her magic phrase.
https://readcomiconline.to/Comic/Mars-Ravelo-s-Darna-Golden-Anniversary-Book/Issue-1?id=146351&quality=hq
Full title :
C94) [BLUE GARNET (Serizawa Katsumi)] Neko Musume o Mesu ni Shitai (Gegege no Kitarou) [Chinese]
(C94) [BLUE GARNET (芹沢克己)] ねこ娘を牝にしたい (ゲゲゲの鬼太郎) [中国翻訳]
https://nhentai.net/g/248525/
Tags: red dress, collar
Main female protagonist Alexia is taken out by a vial of chloroform smashed on the floor. She wakes up bound and gagged. Nice artwork from this Victorian era themed manga.
https://mangaseeonline.us/read-online/Soulless-chapter-5-page-1.html
A blue haired girl is kidnapped by a mad villain. She wakes up chained and gagged to an operating table. The villain taunts her. Luckily, she is rescued.
Sean Galloway’s Shadow Pirates webcomic. In chapter 10, Ginger is kidnapped by a team of bad guys. She’s shown getting chloroformed, and later wakes up tied to a chair. Very good artwork!
https://m.webtoons.com/en/fantasy/shadow-pirates/chapter-10/viewer?title_no=1455&episode_no=10
Kaoru makes her escape from the Hunters Guild by drugging a maid and changing her disguise.
https://mangakakalot.com/chapter/potiondanomi_de_ikinobimasu/chapter_4.1
Main female protagonist finds herself on the "forbidden" floor of her school. Some unknown assailant hand gags her, then knocks her out with chloroform.
https://mangakakalot.com/chapter/zx920300/chapter_3
Source: http://westerncivilization.trifecta3.net/viewtopic.php?f=20&t=8843