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ZzzQuil and Tiredness: What Users Say

Tiredness: mentioned by 3 users (4.4%)

Based on user experiences from 68 ZzzQuil reviews, the following table shows the most commonly mentioned side effects.

All user comments are moderated by Drugs.com. Each review is verified for relevance and screened for inappropriate content. Side effects are user-reported and not clinically verified.

restless leg syndrome 8.8%
headaches 7.4%
insomnia 5.9%
restlessness 5.9%
anxiety 4.4%
increased heart rate 4.4%
tiredness 4.4%

Reviews for ZzzQuil

  • Luc...
  • October 3, 2018

For Insomnia "Diphenhydramine is a fantastic sleep aid, but you need to follow the dosage very, very carefully. I've struggled with insomnia since basically puberty, and a few years back I began taking ZzzQuil daily. I slowly grew a tolerance to it and increased my dosage eventually to 100 mg. One night I was so fed up with tossing and turning, I took another 100 mg (I was 19, OK?). An hour later I was watching the walls ripple like the surface of a pond, little black dots crawling up the walls here and there, and full-blown auditory hallucinations. (I.e., I heard orchestra music coming from the bathroom vent fan amidst its hum). I felt like my body was made of lead and was horribly lethargic. Still, after tossing and turning for hours, I eventually made it to sleep and felt as if I was awake the entire time. My roommate said I talked in my sleep the entire duration of my slumber, and my dreams were very vivid and unsettling. I felt like a train wreck the next day until I could finally go home and sleep."

8 / 10
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27 Report
  • Nev...
  • February 3, 2023

For Insomnia "Tried this for the first time, and never again. I had the worst case of anxiety and restless leg syndrome that I’ve ever experienced in my life. Woke up tired from being up more than if I didn’t take it. On top of that, horrible dreams as well."

1 / 10
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3 Report
  • ean...
  • March 19, 2019

For Insomnia "This made me wake up every 2 hours all night, and I am always overly exhausted the next day, not worth it."

2 / 10
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9 Report

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Reviews may be edited to correct grammar/spelling or remove inappropriate content. Reviews appearing to come from parties with a vested interest are not published. This information is not intended to endorse any medication and should not replace the expertise and judgment of healthcare professionals.