Can Hydroxyzine Make Anxiety Worse?

Hydroxyzine reliably reduces anxiety symptoms in controlled trials and performs about as well as benzodiazepines and buspirone for generalized anxiety disorder. But “can it make anxiety worse” is not an unreasonable question, because the drug’s side-effect profile, its sedating mechanism, and the way it interacts with other substances and certain populations can all create situations where someone taking it ends up feeling more anxious, not less. The answer depends heavily on the person, the dose, how long they use it, and what else is in the picture.

What Hydroxyzine Does in the Brain

Hydroxyzine is a first-generation antihistamine that also blocks certain serotonin and acetylcholine receptors. Its anti-anxiety effect comes primarily from its action on histamine receptors in the brain, which produces sedation and a general calming of arousal. Unlike SSRIs or SNRIs, which reshape neurotransmitter signaling over weeks, hydroxyzine works quickly, usually within 30 to 60 minutes, and the calming effect wears off within several hours. This makes it attractive for acute, situational anxiety: a panic episode, pre-procedure nerves, or a rough night where racing thoughts won’t stop.

The central nervous system effects are driven by the parent compound itself, not by its well-known metabolite cetirizine (the active ingredient in Zyrtec). Research has shown that cetirizine produces antihistamine effects without the sedation or cognitive changes that hydroxyzine causes, confirming that the drowsiness and mental slowing come specifically from hydroxyzine crossing into the brain.¹ This distinction matters because the sedation is both the source of the anti-anxiety benefit and the root of most problems the drug can cause.

The Evidence That It Helps

A Cochrane systematic review of the available randomized trials found that hydroxyzine was significantly more effective than placebo for generalized anxiety disorder. It also performed comparably to benzodiazepines and buspirone for efficacy, and patients tolerated it about as well as those other medications.² So the drug clearly works for many people. The caveat the same review noted is that hydroxyzine causes more drowsiness than other anxiety medications, which introduces a set of downstream issues that can, in roundabout ways, feed anxiety rather than quiet it.

How Sedation Can Loop Back Into Anxiety

The most common way hydroxyzine “makes anxiety worse” isn’t through a direct pharmacological rebound in the way benzodiazepines sometimes produce rebound anxiety after withdrawal. Instead, it tends to happen through sedation-related side effects that erode the things keeping someone’s anxiety manageable in the first place.

Heavy drowsiness during the day can impair concentration, slow reaction time, and leave you feeling foggy. If you’re already anxious about work performance, driving safely, or being mentally sharp in social situations, that cognitive dulling can create a new source of worry. People sometimes describe it as trading one kind of distress for another: the panic is quieter, but now there’s an unsettling feeling of being mentally underwater.

There’s also a timing problem. Hydroxyzine’s sedative effects can persist into the next morning, especially at higher doses or in people who metabolize the drug slowly. Waking up groggy, behind on your day before it starts, and needing caffeine just to function can set up the exact kind of stress-and-catch-up cycle that makes anxiety disorders harder to manage. For people whose anxiety is tightly linked to feeling out of control, the sluggishness can be genuinely counterproductive.

None of this means hydroxyzine pharmacologically worsens anxiety in the way that, say, a stimulant can directly ramp up arousal. It means the side effects can create conditions that anxiety thrives in. The distinction matters for deciding what to do about it: a lower dose or a shift in timing (taking it only at bedtime, for instance) often resolves the issue without switching medications entirely.

The Alcohol Problem

One of the clearest scenarios where hydroxyzine can make things measurably worse involves alcohol. Multiple randomized crossover trials have tested what happens when hydroxyzine and alcohol are combined, and the results are consistent: the combination produces greater cognitive and psychomotor impairment than either substance alone, and the impairment from hydroxyzine plus alcohol is worse than what happens with newer antihistamines mixed with alcohol.³

What makes this especially dangerous is a finding from the same line of research: people who took hydroxyzine with alcohol did not subjectively perceive how impaired they were.³ Their reaction times and cognitive test scores dropped significantly, but their self-assessments didn’t match the objective decline. In separate trials, hydroxyzine with alcohol disrupted driving-related cognitive tasks more than placebo or non-sedating antihistamines.⁴

For someone with anxiety, this matters beyond just safety. People with anxiety disorders are more likely than average to use alcohol as self-medication, and if they’re also taking hydroxyzine, they may not realize how compromised they are. Waking up after that combination feeling terrible, or making poor decisions while impaired and not knowing it, creates exactly the kind of real-world consequences that worsen anxiety long-term. A bad night you can’t fully remember, a near-miss while driving, a conversation you handled poorly: these become new anxiety fuel.

Anticholinergic Side Effects in Older Adults

Hydroxyzine has anticholinergic properties, meaning it blocks the neurotransmitter acetylcholine in addition to histamine. In younger, healthy adults, this usually isn’t a major issue. In older adults, it can become one. Anticholinergic drugs as a class are known to cause a range of central nervous system effects in older people, from mild confusion and difficulty concentrating to outright delirium.⁵

Even the milder end of that spectrum can feed anxiety. An older person who starts feeling confused or mentally foggy after taking hydroxyzine may not attribute it to the drug. Instead, the confusion itself becomes a source of worry: “Am I developing dementia? Why can’t I think straight?” This kind of medication-induced cognitive change is well documented as a contributor to increased dependency and reduced daily functioning in older patients.⁵ Hydroxyzine appears on the Beers Criteria, a widely used list of medications considered potentially inappropriate for older adults, largely because of these anticholinergic risks.

If you’re over 65 and prescribed hydroxyzine for anxiety, the risk-benefit calculation looks different than it does for a 30-year-old. A prescriber should be weighing whether the anti-anxiety benefit outweighs the chance of inducing confusion that generates its own anxiety. Alternatives with less anticholinergic burden exist and may be worth discussing.

Young Children and Longer-Term Outcomes

Hydroxyzine is one of the few medications commonly prescribed to very young children, often for itching related to eczema or allergies. A large population-based study followed over 80,000 children in British Columbia who received hydroxyzine prescriptions before age six. The researchers found that children who received repeat prescriptions had higher rates of anxiety diagnoses by age ten compared to children who had only a single prescription. After adjusting for age, sex, and region, frequent hydroxyzine use was associated with roughly 28 percent higher odds of a later anxiety diagnosis compared to short-term use.⁶

The same study found similar patterns for tic disorders and behavioral disturbances, with the proportion of affected children rising as hydroxyzine exposure increased from short-term to frequent use.⁶ These are observational findings, and the study’s authors were careful to note that the direction of causation isn’t fully clear. It’s possible that children who need more hydroxyzine are already the ones with emerging neurodevelopmental differences. But the dose-response pattern (more prescriptions, more diagnoses) is the kind of signal that warrants caution, especially because hydroxyzine is sometimes prescribed almost reflexively for pediatric itching without much thought about cumulative exposure.

For parents, the practical takeaway is straightforward: short courses of hydroxyzine for an allergic flare are probably fine, but if your child’s pediatrician keeps refilling it month after month, it’s worth asking whether non-sedating alternatives or non-pharmacological approaches could step in.

Where Hydroxyzine Sits in the Treatment Hierarchy

Even setting aside the question of whether it can worsen anxiety, hydroxyzine doesn’t rank highly among modern options for treating generalized anxiety disorder. An algorithm developed to rank GAD medications based on efficacy, tolerability, and cost placed hydroxyzine last out of eight categories, behind pregabalin, venlafaxine, SSRIs, tricyclic antidepressants, buspirone, antipsychotics, and benzodiazepines.⁷ That doesn’t mean it’s useless. It means that for ongoing, daily anxiety, there are medications with stronger evidence and fewer cognitive side effects. Hydroxyzine tends to shine as a short-term, as-needed option rather than as someone’s primary daily anxiety medication.

The Cochrane review’s finding that hydroxyzine is equivalent to benzodiazepines and buspirone is worth putting in context.² Benzodiazepines are effective but carry dependence risk, and buspirone works but often takes weeks to reach full effect. Hydroxyzine fits a niche: fast-acting, non-addictive, and available without the scheduling restrictions that apply to benzodiazepines. Those advantages are real and explain why it’s prescribed so often despite its low ranking in formal algorithms. But when someone finds that hydroxyzine is making their anxiety worse rather than better, the relatively long list of alternatives means there’s usually somewhere better to go.

Rebound Anxiety and Tolerance

Hydroxyzine doesn’t produce the classic benzodiazepine-style rebound anxiety, where stopping the drug causes anxiety that’s temporarily worse than the original problem. This is one of its main selling points: you can take it as needed and stop without a tapering schedule. However, some people do report feeling more anxious when a dose wears off, particularly if they’ve been using it nightly for sleep. The mechanism isn’t well studied, but the most plausible explanation is that the abrupt return of baseline arousal after hours of sedation feels subjectively worse by contrast. It’s a perception issue more than a pharmacological one, but the distress it causes is real regardless of the label.

Tolerance to the sedative effects develops relatively quickly in some people, which means the anti-anxiety benefit can fade after a few weeks of regular use. When that happens, the temptation is to increase the dose, which brings more anticholinergic side effects without necessarily restoring the original calming sensation. This escalation pattern is another way hydroxyzine can indirectly make anxiety management harder over time, even though the drug itself isn’t causing a chemical worsening of the disorder.

Sedation Without Anxiolysis

There’s a subtlety about hydroxyzine that sometimes gets lost in prescribing conversations: sedation and anxiety reduction are not the same thing. A drug can make you very drowsy without actually reducing your anxious thoughts or physiological arousal. One study using hydroxyzine as a surgical premedicant found that patients were significantly more sedated than those given placebo, but the study could not detect a meaningful anxiolytic effect because the sedation didn’t clearly translate into reduced anxiety scores.⁸

This is relevant because many people prescribed hydroxyzine for anxiety experience exactly this disconnect. They feel sleepy but still anxious, which is an unpleasant combination that can feel worse than untreated anxiety alone. You’re worried, but now you’re also struggling to stay awake and think clearly. For some types of anxiety, particularly the cognitive-rumination-heavy kind where the problem is racing thoughts rather than physical tension, a drug that primarily sedates without addressing the thought pattern may genuinely make the experience of anxiety more distressing, not less.

Practical Signs That Hydroxyzine Isn’t Working for You

Because hydroxyzine is often handed out as a low-commitment, try-it-and-see option, people sometimes stick with it longer than they should when it’s not helping. A few signals worth paying attention to:

Next-day fog: If you’re consistently groggy, unfocused, or mentally slower the morning after a dose, the sedation is outlasting the useful window and probably creating new stressors.
Sleepy but still anxious: If the drug knocks you out but your anxious thoughts persist right up until you fall asleep and resume the moment you wake up, you’re getting sedation without meaningful anxiety relief.
Dose creep: If the dose that worked a month ago no longer does anything and you’re thinking about increasing it, tolerance has set in and you’re unlikely to get sustained benefit from more of the same drug.
New confusion or memory issues: Especially in adults over 60, these are anticholinergic side effects that warrant a conversation with your prescriber rather than continued use.

None of these mean hydroxyzine is a bad medication across the board. They mean it’s a bad fit for your specific situation, and the list of alternatives is long enough that there’s no reason to white-knuckle through a drug that’s making things worse. SSRIs, SNRIs, buspirone, and even non-pharmacological approaches like cognitive behavioral therapy all have strong evidence for generalized anxiety and don’t carry the sedation burden that makes hydroxyzine a double-edged tool.