Namorita is KO'd.

Hellcat gets blasted.

From the 'Operazione Godzilla' story: A woman is gassed by a robot.

From the 'Fuga dal terzo pianeta' story: A woman is knocked out with a quick injection.

From the 'I due volti dell'incubo' story: two women are kidnapped.

From the Cleopatra 2000 story, a woman passes out after being hypnotized by a snake and is later given an injection while trying to flee a hospital.

A woman is chloroformed.

Magik and Storm are blasted into unconsciousness by the young mutant Sapna.

Haste (Martin Helling) from the Freedom Force takes down the X-Men leader Storm before she can use her powers.

Storm is defeated by the drugged feathers of Archangel.

Storm is knocked out cold with a blow to the head by Smokescreen.

Cassandra Cain and Superboy are drugged and captured by Doctor Sin. The villain try to drown them, but obviously they are able to escape the deathtrap.

 Storm receives an invitation to dinner at the Hellfire Club by Shinobi Shaw and a bouquet of roses drugged with a sort of neuro toxin. Despite the drug-induced manipulations, Storm refuse to join the Hellfire Club, so Benedict Kine plays her nervous system, sending her agony. Later Ororo awakes tied to a chair. 

Jean Grey and Storm appear unconscious on the cover. The villainess Cancellator elbows Storm in the face knocking her out.

All of the Avengers are knocked out in a fight with Michael Korvac. Ms Marvel arrives to help, but she is subjected to the same treatment. Korvac then decides to kidnap her, lifting her limp body under his shoulder and flying away.

Ms. Marvel is knocked unconscious by a robot Iron Man imposter, who is controlled by Ultron. Vision and a fake Ms. Marvel appear, to kidnap the real Ms. Marvel and plant a decoy. Source: https://www.youtube.com/watch?v=4KMruVr8Zdk

Ms. Marvel is fighting alongside Hawkeye and Wasp against the Super Skrulls, who have come to invade the Earth. In the fight, she is the only one to get knocked unconscious and the team get captured. Hawkeye and Wasp get restrained, and Ms. Marvel's limp body gets thrown over the shoulder of the Wolverine Super Skrull....

Chloroform scene from a French graphic novel. Found on the Western Civilization Forum.

The organization "the Five" has defeated the future Justice League (their Flash is a women). Source: ComicOnlinefree.com

Green Lantern knocks out the reality warper Locus. Source: ComicOnlinefree.com