Solian and Amisan contain the same active ingredient, amisulpride. They also undergo bioequivalence tests, which means that their pharmacological effects are identical.

Differences in how patients feel, such as weight gain, may be due to individual reactions to the drug or other factors, such as diet or lifestyle. It's worth noting that amisulpride can cause weight gain in some patients, but there's no evidence that one of these drugs is more likely to do so than the other.

Any concerns about side effects should be discussed with your doctor.

If you need more personalized advice, you can use teleconsultations here:

https://www.gdziepolek.pl/telekonsultacja

Through Gdziepolek, it is possible to book medicines in a selected pharmacy in Polish:

https://www.gdziepolek.pl/produkty/72586/solian-tabletki/apteki

https://www.gdziepolek.pl/produkty/4685/amisan-tabletki-powlekane/apteki

I have attached additional information that may be helpful:

https://www.gdziepolek.pl/artykuly/czym-sa-zamienniki-lekow