What can I use instead of Glucardiamid for fatigue and weakness?

Yes, Cardiamid https://www.gdziepolek.pl/produkty/15710/cardiamid-z-kofeina-smak-cytrusowy-pastylki-lamelki-zelki/apteki might be a good choice. It is used in states of excessive fatigue and fatigue. It contains, m.in caffeine, ginseng and guarana extracts, which stimulate and support concentration. Preparations that also help reduce fatigue, support maintaining proper mental condition and improve concentration are those containing, m.in, ginseng root extract and a complex of vitamins, e.g. Olimp Ginseng vita comlex https://www.gdziepolek.pl/produkty/86619/zen-szen-vita-complex-kapsulki/apteki, Naturell ginseng https://www.gdziepolek.pl/produkty/89938/naturell-zen-szen-forte-tabletki/apteki, or supplements with Rhodiola rosea, e.g. Arctic Root https://www.gdziepolek.pl/produkty/7105/arktyczny-korzen-alter-medica-tabletki/apteki. If fatigue, fatigue and weakness are symptoms that persist for a long time, it is worth taking care of the right amount of sleep and diet and possibly perform basic tests after consulting a doctor. We wrote more about it here: https://www.gdziepolek.pl/artykuly/nasze-sposoby-na-zmeczenie. Using the links attached above, you can compare the prices of preparations, book them at the selected pharmacy or order them with home delivery.