Can discontinuing Seroquel (quetiapine) cause restless‑legs syndrome?

Can Discontinuing Seroquel Cause RLS?

Discontinuing Seroquel (quetiapine) does not typically cause restless legs syndrome (RLS), but rather quetiapine itself is known to induce RLS during active treatment. The FDA label for Seroquel describes a discontinuation syndrome characterized by insomnia, nausea, vomiting, headache, diarrhea, dizziness, and irritability—but notably does not list RLS as a withdrawal symptom 1.

Understanding the Relationship Between Quetiapine and RLS

Quetiapine-Induced RLS (During Treatment)

The evidence consistently demonstrates that quetiapine causes RLS while patients are taking it, not when stopping it:

• Multiple case reports document quetiapine-induced RLS occurring at low doses (25-250 mg at bedtime) in a dose-dependent manner, particularly in patients with affective disorders taking concomitant antidepressants 2, 3
• RLS can emerge after even a single low dose of quetiapine 4
• The mechanism involves dopaminergic blockade, though quetiapine's relatively low D2 receptor binding makes this association somewhat paradoxical 4, 5

What Actually Happens Upon Discontinuation

The FDA-documented discontinuation syndrome includes 1:

• Insomnia (most common)
• Nausea and vomiting
• Headache
• Diarrhea
• Dizziness
• Irritability

These symptoms typically resolve within 1 week post-discontinuation and occurred in 12.1% of patients in controlled trials versus 6.7% on placebo.

Clinical Reasoning: Why RLS Improves Rather Than Worsens

If a patient develops RLS symptoms after stopping quetiapine, consider these alternative explanations:

1. Pre-existing RLS was masked by quetiapine's sedating effects and becomes apparent once the medication is withdrawn
2. Concurrent antidepressant withdrawal if stopped simultaneously—antidepressant withdrawal can rarely cause RLS 6
3. Iron deficiency that was present but unrecognized 7
4. Misidentification of withdrawal akathisia as RLS (these are distinct conditions requiring careful differentiation)

Important Clinical Pitfalls

Do not confuse akathisia with RLS. Akathisia presents as:

• Inner restlessness without the sensory component typical of RLS
• No circadian pattern (RLS worsens at night)
• No relief with movement in the same way RLS responds
• Can occur with antipsychotic withdrawal

If RLS symptoms appear after quetiapine discontinuation:

• Check ferritin and transferrin saturation (target ferritin >75 ng/mL for RLS treatment per current guidelines [8-8])
• Review all concurrent medications, especially antidepressants
• Consider whether symptoms represent withdrawal akathisia rather than true RLS
• Evaluate for primary RLS that was previously undiagnosed

Management Approach

For true RLS emerging in this context, follow the 2025 AASM guidelines [8-8]:

First-line treatments:

• Gabapentin or pregabalin (strong recommendation, moderate certainty) 8
• IV ferric carboxymaltose if ferritin is low (strong recommendation, moderate certainty) 8
• Oral ferrous sulfate if appropriate iron parameters (conditional recommendation, moderate certainty) 8

Avoid dopamine agonists (pramipexole, ropinirole, rotigotine) as standard treatment due to long-term augmentation risk [8-8,9].

Bottom line: The temporal relationship you're observing is likely coincidental or represents unmasking of pre-existing RLS rather than a true withdrawal phenomenon. Quetiapine causes RLS during treatment, not upon cessation.