Yes, it is possible that you may experience a sleeping effect at the beginning of taking sertraline (which is an antidepressant in the class of serotonin reuptake inhibitors). Some people report fatigue or drowsiness as one of the first side effects when starting therapy. However, as the body adapts to the drug, these side effects may diminish or disappear over time.

On the other hand, sertraline can disrupt sleep in some people, especially when taken in the evening. Sleep abnormalities, such as trouble falling asleep, waking up at night, nightmares, or restless sleep, may appear in some patients as a side effect of sertraline.

However, reactions to psychotropic drugs, including sertraline, can be very individual. Therefore, it is essential to regularly inform your doctor about your experience and possible side effects so that you can adjust your dosage or change your therapy if necessary.

I also encourage you to report the symptoms you are experiencing to your doctor, as well as to report the occurrence of an adverse reaction of the preparation. Reporting side effects allows you to increase control over the medicines available on the market. We wrote more about how and why to report side effects in the article: 

https://www.gdziepolek.pl/artykuly/jak-i-dlaczego-zglaszac-dzialania-niepozadane

If you are concerned about this situation, it is always advisable to consult a doctor who can give you more personalized advice. If you are not able to take advantage of the advice, I am attaching a link to the online teleconsultation:
https://www.gdziepolek.pl/telekonsultacja/z-psychiatra

We also encourage you to familiarize yourself with materials on similar topics:

https://www.gdziepolek.pl/artykuly/leki-na-depresje

https://www.gdziepolek.pl/artykuly/skuteczne-sposoby-na-stres

https://www.gdziepolek.pl/artykuly/bezsennosc