  We study strangeness dynamics in reactions relevant for the formation of
multi-strange hypernuclei. In particular, we discuss the in-medium effects on
elementary hyperon-nucleon ($YN$) channels, which are relevant for the
production of hypernuclei at PANDA. The results indicate strong in-medium
effects on $YN$-scattering, which might be important for hypernuclear studies
at PANDA.
