Paroxetine Side Effects and Management

Introduction to Paroxetine Side Effects

The American Academy of Child and Adolescent Psychiatry reports that paroxetine has the highest risk of discontinuation syndrome among all SSRIs, characterized by dizziness, fatigue, lethargy, and general malaise 1, 2, 3
Paroxetine is associated with increased risk of suicidal thinking or behavior compared to other SSRIs, with pooled absolute rates of 1% with antidepressants vs 0.2% with placebo 4

The American Academy of Child and Adolescent Psychiatry recommends close monitoring for suicidal thinking or behavior, particularly within the first 1-2 weeks of initiation and after dosage adjustments 4, 8
Paroxetine has higher rates of sexual dysfunction than fluoxetine, fluvoxamine, nefazodone, or sertraline, representing a significant quality of life concern that may affect medication adherence 5, 6, 7, 8
The American Academy of Child and Adolescent Psychiatry warns of the risk of serotonin syndrome when combining serotonergic medications, with symptoms arising within 24-48 hours 2, 3

Paroxetine interacts with drugs metabolized by CYP2D6, including tamoxifen, which increases the risk of dying from breast cancer over 5 years when combined 2, 3
The American Academy of Child and Adolescent Psychiatry advises caution with other serotonergic drugs, including SSRIs, SNRIs, TCAs, tramadol, meperidine, methadone, fentanyl, dextromethorphan, St. John's wort, and tryptophan 2, 3

The American Academy of Child and Adolescent Psychiatry recommends starting with subtherapeutic "test" doses to assess tolerability, as initial adverse effects can include anxiety or agitation 1, 3, 4
The American Academy of Child and Adolescent Psychiatry advises against discontinuing paroxetine abruptly, recommending a taper over 10-14 days minimum to limit withdrawal symptoms 9, 10