5 Rare Old Medicines That Had Horrific Side Effects

2. Bulbocapnine.

Similar in structure to apomorphine, bulbocapnine is found in Corydalis cava. It is one of those exciting drugs with a different effect on different animals. In cold-blooded species, it acts in a similar way to morphine by reducing sensitivity to pain and causing sedation.In warm-blooded animals, however, bulbocapnine induces catalepsy, which is a stiffening of muscles within a given posture that is unable to be moved. The users are frozen in place.