Can I convert Isoptin into Nebilet?

The decision to replace Isoptin with Nebilenin is decided by your doctor. These are completely different drugs, they are not counterparts. We wrote about what are equivalents here: https://www.gdziepolek.pl/artykuly/czym-sa-zamienniki-lekow A pharmacist does not prescribe new prescription drugs, only a doctor. If it is not possible to visit a stationary visit, I encourage you to use the teleadvice offered, m.in. by the Gdziepolek.pl portal: https://www.gdziepolek.pl/telekonsultacja If you think that the ailments you describe may be related to the use of Isoptin, it is necessary to report it to your doctor or do it yourself. About why and how to report such side effects that have not been previously described, we wrote here: https://www.gdziepolek.pl/artykuly/jak-i-dlaczego-zglaszac-dzialania-niepozadane https://www.gdziepolek.pl/artykuly/czy-bac-sie-dzialan-niepozadanych-lekow