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iHerb Customer Reviews



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  • Due to Japanese Custom’s regulations, a maximum of one bottle per order can be imported into Japan.
  • Reviews | English
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    Much Better Than Ambien or other prescription sleeping aids.

    Posted by Reviewer1805827 on Jul 24, 2008

    This is a superior product. You literally sleep like a baby: Deeply, and well. Take it about 1/2 hour before you want to go to sleep. You wake up refreshed, not dopey feeling and drugged. You wake up like you went to bed naturally. I took it during exam period to regulate my sleep which had gotten out of wack because of so many all-nighters. I got back to normal patterns in three days. Can't say enough good things about Knock-Out, except the drug companies better watch out, because this product leaves them far behind.

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    Posted by Reviewer1649833 on Dec 30, 2011

    Works very well and does not appear to cause habituation.

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    Help with getting to sleep BUT

    Posted by Reviewer1049419 on May 09, 2009

    I was so pleased to be getting to sleep hours earlier than usual and staying asleep hours longer that it took me a while to figure out that I was suffering from much worse than usual dry mouth. I have suffered from dry eye and dry mouth for years and have taken flaxseed oil at night to combat the dry eye and used a spray to moisten my mouth so as not to put to much strain on my bladder at night. I have had increasing dry mouth day and night of late and by process of elimination figured it is probably the Knock-out. My doctor thinks it is probably the valerian in the mix that is the culprit. In any case you or the manufacturer might want to add a warning to the sufferers of dry mouth. I will probably continue to use it occasionally as it has been effective in improving my ability to get to sleep and stay asleep.

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    Great product, fast+reliable shipping

    Posted by Reviewer1652346 on Jan 12, 2008

    Knock-out works well without making you feel sedated or groggy, and with more natural/gentle ingredients. I normally pay $21 at my local health store, so this is a great price even with the shipping.

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    it works

    Posted by 4725394335733619142 on Mar 03, 2015

    Occasionally, I cannot fall asleep. When it occurs, I take one pill. It is happy to see it does work!

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    the best sleep booster I've ever tried

    Posted by 4679714736134822234 on May 24, 2016

    I've tried a lot of sleep booster, but this one - in the best for me.

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    Nice sleep

    Posted by Reviewer1263751 on May 30, 2012

    Very good way to induce your brain and body to go to bed. Recomended!

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    IT does knock you out... great night of sleep without drowsiness!!! excellent

    Posted by Reviewer1761634 on Jan 31, 2014

    I've been using Valerian to sleep for a while, but lately when I wake up during the night, I wasn't going to back to sleep very well ... so I'm trying something new... I don't like to use strong pharmaceuticals, which can make me really drowsy the next day and can be habit forming.... so I'd rather stick to naturals.... I've been using 'Knock-out' only for a week.... the sleep is wonderful, quick to sleep, if I wake up during the night, I quickly fall asleep again.... I'm getting traight 7 hours and could possibly get another 1-2 if I had the time.... Its highly recommended... the only caveat is that having melantonin you need to have 2-3 days off a week, so that your body doesn't stop making it and you always rely on supplements... excellent stuff...

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    we both use it

    Posted by Reviewer1440886 on Jul 29, 2008

    this works! i only need a third of a tablet. i take it every so often when i know i definitely want to sleep that night!

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    Schiff, Knock-Out

    Posted by Reviewer2608986 on Dec 24, 2008


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