This was an unfamiliar concept to me, so here is a summary in case it is unfamiliar to anyone else:
Drugs that have been granted orphan drug status are offered scientific and administrative advice, as well as reductions in marketing authorization and other regulatory fees. After obtaining marketing authorization, a ten-year protection period against generic products is guaranteed for the treatment of the specific orphan disease. In addition, orphan drugs receive national support.
https://fimea.fi/myyntiluvat/myyntilupahakemus/harvinaislaakkeet