Across 53 first-hand reports, people mentioned a side effect 17 times (about 32 per 100 reports). The most common: drowsiness, vivid dreams, fatigue. User reports show what people notice — they can't tell you whether Hydroxyzine is safe for you.
“I also take naproxil (hyroxyzine) as a prn if I need it, but it's almost like taking a Benadryl. It's more effective with panic than anxiety.”
“Over the last few years I've been put on Hydroxyzine, Lexapro, Cymbalta, and Mirtazapine...none helped with anxiety”
“Hydroxyzine (worked soooo well, but it always makes me dream)”
“hydroxyzine just makes me feel like a zombie the next day”
“These definitely knock me out, but I wake up very groggy and am like that for half the next day.”
“What did me in was a single dose of hydroxyzine mixed with a single dose of sertraline.”
Conclusion: The studies in this review suggest hydroxyzine could be considered as a short-term treatment option for adults with insomnia for whom previous therapy was ineffective, not tolerated, or contraindicated. Additional long-term studies with an active comparator are needed to further establish its role in insomnia treatment.