Does Citalopram Cause Insomnia or Drowsiness?

Citalopram can cause both insomnia and drowsiness in different patients. Studies show that approximately 15% of patients experience insomnia, while 18% report drowsiness or fatigue. The timing of your dose significantly affects which side effect you're more likely to experience. Taking citalopram in the morning typically reduces sleep disruption, while evening doses may increase drowsiness but can worsen insomnia. Individual responses vary based on factors like metabolism, other medications, and underlying sleep patterns. Most sleep-related side effects occur during the first 2-4 weeks of treatment and often improve as your body adjusts to the medication.