Escitalopram Research Paper

1025 Words3 Pages

Escitalopram, the pure S-enantiomer of its racemic derivative, i.e. citalopram belongs to the selective serotonin reuptake inhibitors (SSRI) class of anti-depressants. Ever since its introduction, it has now rapidly become one of the therapeutic mainstays for major depressive disorders and a spectrum of anxiety disorders. Despite escitalopram being a relatively safe SSRI, there have been a few reports implicating it as the offending agent in causing life-threatening Hyponatraemia[1-4]. The incidence of hyponatraemia varies from 0.5-25% with different types of SSRIs[4]. However, our literature search revealed only eight cases of escitalopram induced hyponatraemia …show more content…

The patient was receiving a combination of oral prednisolone, hydroxychloroquine and methotrexate for her complaints of seronegative spondyloarthropathy. Further, to counter her dysthymia, she had been initiated on oral escitalopram two weeks prior to presenting in our hospital. Her blood sugar levels were being managed using a combination of fast and long acting insulin. Further, on obtaining a detailed history and after a thorough clinical examination, the mild abdominal pain was attributed to severe constipation. Her initial work-up revealed her to be severely hyponatraemic with serum sodium level of 107 mmol/L. Her previous sodium levels, prior to starting escitalopram, was normal (137.6 mmol/L). At this juncture, in view of a possibility of drug induced hyponatraemia, escitalopram was withheld. Further investigations revealed high urinary sodium level (36 mmol\L), elevated urinary osmolality (291 mmol/kg) and reduced serum osmolarity (235 mmol\kg). The low serum urea (11.0 mg/dL), serum creatinine (0.4mg\dL) and low uric acid (2.2 mg/dL) added substance to the …show more content…

Hence it could be missed very easily[5]. The median time duration required for the onset of hyponatraemia following SSRI usage has been pegged at 13 days[7]. However, hyponatraemia has been reported as late as 3 months after initiating patients on SSRI[7]. In addition, as evidenced by many previous reports, various patient attributes that may contribute to the possibility of developing hyponatraemia following escitalopram use have emerged over the years[3,5]. Hence, such patients who are at-risk of developing hyponatraemia, could be monitored for lethargy, insomnia, irritability, confusion and other features indicative of hyponatraemia. If noted, then it should immediately raise a suspicion of SSRI induced Hyponatraemia[2]. Our patient fits the bill here as duration of onset of hyponatremia in her case was around 2 weeks approximately. In addition, she possessed risk factors like female gender, concomitant medication usage for co-morbidities like diabetes mellitus[3]. However, it is important to bear in mind that the absence of risk factors does not preclude the patients receiving SSRIs from developing hyponatraemia, possibly SIADH. In light of the

Open Document