has been reported as a common side effects of taking Citalopram
Other side effects being drowsiness
, insomnia, nausea, weight changes, decreased sex drive, etc.
Consultation with your treating physician & discussion regarding the reduction of dosage or any alternative medication to citalopram will be helpful in this regard.
However, dark coloration of urine may also be due to:
1. Diseases of the kidney like glomerulonephritis
2. Vigorous exercise can also cause dark urine due to trauma to the bladder, breakdown of red blood cells, or dehydration
Investigations like Urine examination & Ultrasound scan of Abdomen & Pelvis will be helpful in clinching the diagnosis.
Wishing you a Good Health. Let me know if I need to clarify further.
Thanks & take care.