Why it happens
Antidepressants can affect blood pressure regulation, particularly when standing up quickly. They can also affect inner-ear and vestibular signalling. Maudsley Prescribing Guidelines describe mild dizziness as a known class effect, more pronounced with some medications than others, and most prominent in the first week of treatment and immediately after dose increases.
When it tends to ease
Dizziness is typically most pronounced in the first 72 hours and softens meaningfully by the end of week two. By week three, most patients report a return to baseline. Persistent dizziness beyond the first month, or dizziness severe enough to affect safety, warrants prompt prescriber review.
What helps in the meantime
Stand up slowly. Particularly first thing in the morning and after sitting for long periods. Postural blood-pressure changes are the most common driver of dizziness in the first weeks.
Stay well hydrated. Dehydration amplifies postural dizziness. The basics matter more than usual while your body is adjusting to the medication.
Avoid alcohol in the first weeks. Alcohol compounds dizziness and is best avoided during the initial adjustment period when the effect is already most pronounced.
Ask about dose timing. If dizziness affects driving or work safety, discuss with your prescriber — adjusting when you take the medication each day may reduce the peak effect.
What to flag to your prescriber
Raise these with your prescriber or seek care
- Dizziness severe enough to affect safe driving or working — do not push through; speak to your prescriber.
- Fainting or near-fainting episodes — these warrant prompt review rather than waiting for a routine follow-up.
- Dizziness accompanied by chest pain or breathlessness — seek medical attention without delay.
- Persistent dizziness past week three with no improvement — your prescriber may consider dose timing, hydration, or other contributing factors.
- Light-headedness with very low blood pressure readings — seek urgent review.
Frequently asked questions
Why am I dizzy when I stand up on my antidepressant?
Postural blood-pressure changes are a documented class effect, especially in the first week of treatment and after dose increases. Standing up slowly and staying well hydrated are the most reliably helpful adjustments.
Should I stop driving while I'm dizzy?
If dizziness is significant enough that you don't feel safe driving, do not drive. Speak to your prescriber rather than pushing through — they may be able to adjust the timing of your dose to reduce the peak effect.
How long does dizziness last on a new antidepressant?
Typically most pronounced in the first 72 hours and resolved by week two or three for most patients. Dizziness that persists beyond the first month without any improvement is worth raising at your next prescriber appointment.
Related reading
Evidence and sources referenced
- NICE Guideline NG222 — Depression in adults: treatment and management (United Kingdom).
- Royal Australian and New Zealand College of Psychiatrists (RANZCP) — Clinical Practice Guidelines for Mood Disorders.
- NPS MedicineWise — prescriber and patient resources on antidepressant treatment (Australia).
- Royal College of Psychiatrists — patient information on antidepressants.
- TGA and FDA — product information for SSRI and SNRI medication classes.
- Maudsley Prescribing Guidelines in Psychiatry — prescribing patterns and side-effect timelines.
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