Quick answer: Anti anxiety medications fall into five main classes. SSRIs and SNRIs are first-line (taken daily, work in 2-4 weeks). Benzodiazepines work fast (15-30 minutes) but are short-term only (2-4 weeks max) due to dependence risk. Buspirone is gentler and non-addictive but slower. Hydroxyzine (an antihistamine) is FDA-approved for short-term relief. Beta-blockers are off-label for physical anxiety symptoms only. Your doctor will pick based on your anxiety type, how fast you need relief, medical history, and other medications. Most people combine medication with therapy (especially CBT) for best results.
If you're in crisis, call 988 (US Suicide and Crisis Lifeline) or text HOME to 741741 (Crisis Text Line).
The 5 main anti anxiety medication classes at a glance
Class · Onset · Duration · When used · Main pro · Main con
SSRIs (sertraline, escitalopram, paroxetine) · 2-4 weeks · Long-term, 6-12+ months · Daily, first-line for chronic anxiety · No dependence, safe long-term · Nausea first week, sexual side effects possible
SNRIs (venlafaxine, duloxetine) · 2-4 weeks · Long-term, 6-12+ months · Daily, when SSRIs don't work · Addresses both serotonin and norepinephrine · Similar to SSRIs, may raise blood pressure
Benzodiazepines (alprazolam, clonazepam, lorazepam) · 15-30 min · 4-12 hours · Bridge for first 2-4 weeks while SSRI kicks in · Fast relief in acute panic · High dependence risk, memory impairment
Buspirone (Buspar) · 3-6 weeks · Long-term · Mild-to-moderate anxiety, non-addictive option · Non-addictive, fewer side effects · Slower, less effective for severe anxiety
Hydroxyzine (Vistaril, Atarax) · 15-30 min · 4-6 hours · Short-term relief, as bridge to SSRIs · FDA-approved, non-addictive, fast · Drowsiness very common, short-term only
SSRIs and SNRIs: the daily go-to medications
SSRIs (selective serotonin reuptake inhibitors) are the gold standard, recommended first-line by the American Psychiatric Association. They work by increasing serotonin in your brain, which regulates mood and fear response. SNRIs do the same but also boost norepinephrine.
What to expect: 2-4 weeks before you notice benefit; full effect by week 6-8. Early side effects (nausea, headache, jitteriness) usually fade in 1-2 weeks. No dependence or tolerance. Safe for 6-12 months or longer. Most people stay on them 6-12 months after symptoms resolve, then taper slowly.
Common SSRIs: sertraline, paroxetine, escitalopram, fluoxetine, citalopram. Common SNRIs: venlafaxine, duloxetine.
Benzodiazepines: fast but short-term only
Benzodiazepines (Xanax, Valium, Ativan) deliver relief in 15-30 minutes by dampening overall brain activity. The American Psychiatric Association advises against using them alone.
Why short-term only: Your body adapts fast. After 2-4 weeks of daily use, you develop tolerance (needing higher doses) and physical dependence (withdrawal can include seizures). Withdrawal is unpleasant and lasts weeks to months.
Best practice: Use benzos only with an SSRI starting together. The benzo gives fast relief while the SSRI takes 2-4 weeks to work; then taper and stop the benzo. Never use alone or long-term.
Buspirone: a gentler, slower option
Buspirone works differently than other anxiety meds and takes 3-6 weeks, similar to SSRIs. It is non-addictive, non-sedating, and has fewer side effects than benzodiazepines. But it only works for mild-to-moderate anxiety and is often combined with SSRIs rather than used alone.
Good for: People who cannot tolerate SSRIs, those needing a non-sedating option, or lower-risk anxiety.
Hydroxyzine: FDA-approved antihistamine for acute relief
Hydroxyzine (Vistaril, Atarax) is a first-generation antihistamine FDA-approved for short-term anxiety. It works in 15-30 minutes, is non-addictive, and safer than benzodiazepines (no dependence risk). But drowsiness is nearly universal and it is approved for short-term use only (typically 4 weeks).
Common use: As a bridge while SSRIs take effect, or for acute anxiety in specific situations (before a medical procedure, stressful event).
Beta-blockers: off-label for physical symptoms
Beta-blockers (propranolol, atenolol) block adrenaline effects on the heart and blood vessels, reducing racing heart, tremor, sweating. They work in 30-60 minutes and are sometimes used off-label for performance anxiety, social anxiety in specific situations, or job interviews.
Important: Beta-blockers do NOT treat the worry or catastrophic thinking driving anxiety. They only manage physical symptoms. Not suitable for people with asthma, COPD, or certain cardiac conditions. Best paired with SSRIs or therapy.
How doctors choose which medication
Your doctor considers:
- Anxiety type and severity (GAD, panic disorder, social anxiety, or just situational?). SSRIs are first-line for most.
- How fast you need relief (benzodiazepines or hydroxyzine for acute; SSRIs for ongoing prevention).
- Your medical history (asthma rules out beta-blockers; cardiac issues affect benzos).
- Other medications you take (drug interactions matter).
- History of substance abuse (benzos and alcohol are risky; buspirone is safer).
- Your tolerance for side effects (drowsiness is a dealbreaker for some; sexual side effects for others).
When to see a professional
Seek evaluation if you:
- Have had 2 or more panic attacks
- Worry significantly about having another attack
- Are avoiding places where anxiety might happen
- Anxiety interferes with work, school, relationships, or daily life
- Are using alcohol or drugs to cope with anxiety
- Anxiety symptoms last more than 2 weeks and are worsening
Chest pain or cardiac symptoms? If you have new, severe, or radiating chest pain (to arm, jaw, or back), shortness of breath, or fainting, call 911 or go to the ER. Anxiety attacks mimic heart attacks; a clinician should rule out cardiac causes the first time.
Crisis support: Call or text 988 (US Suicide and Crisis Lifeline), text HOME to 741741 (Crisis Text Line), call 111 option 2 (NHS, UK), or visit https://findahelpline.com for international resources.
FAQ
What are the most common anti anxiety meds?
SSRIs (sertraline, escitalopram, paroxetine) and SNRIs (venlafaxine, duloxetine) are the most prescribed. Benzodiazepines (alprazolam, lorazepam, clonazepam) are widely used but only for short-term bridge therapy. Buspiron and hydroxyzine are alternatives for people who cannot tolerate SSRIs.
How long do anti anxiety meds take to work?
Benzodiazepines and hydroxyzine: 15-30 minutes. SSRIs, SNRIs, buspirone: 2-6 weeks to start showing benefit, with full effect by week 6-8. Do not give up on an SSRI before week 8 if there is no change.
Can anti anxiety meds be addictive?
SSRIs, SNRIs, buspirone, and hydroxyzine are not addictive. Benzodiazepines can cause physical dependence if used daily beyond 2-4 weeks. This is why benzos are a bridge, not ongoing treatment.
Do anti anxiety meds work without therapy?
Medication alone is effective for many people, but medication plus CBT (cognitive behavioral therapy) has higher success rates and longer-lasting benefits. If you cannot access therapy, medication is still worth trying.
What if my first anti anxiety med doesn't work?
This is common. Different medications work differently due to individual brain chemistry and genetics. Your doctor should try a second SSRI, an SNRI, buspirone, or hydroxyzine. Most people find a medication that works within 2-3 tries.
Should I combine anti anxiety meds with alcohol?
No. Alcohol increases drowsiness, dizziness, and cognitive impairment. Benzodiazepines plus alcohol is particularly dangerous. Avoid alcohol while on any anxiety medication.
How do I stop taking anti anxiety meds?
Never stop abruptly. Sudden cessation triggers withdrawal or discontinuation symptoms (rebound anxiety, insomnia, dizziness, brain zaps). Your doctor will create a gradual taper, typically 4-8 weeks for SSRIs, 2-4 weeks for benzodiazepines. Taper slowly; slower is safer.