The drink contains Fursultiamine, a derivative of thiamine(Vitamin B1) which was developed in Japan by Takeda Pharmaceutical Company in the 1960s and is incorporated into most, if not all Alinamin products.
The taste is bitter and sweet at the same time. This is one of the most bitter energy drinks I've done a review on. However, it's not disgustingly bitter, it's just slightly bitter which is actually quite nice. However, you might need a little time to get used to it. As for me, I still haven't gotten used to this taste.....definitely not my favorite.
The effects of this are normal. When I say the effects of an energy drink is "normal", I mean that it is in the same range as the normal Tivovita, S-CUP, Lipovitan-D, etc which are all about 150yen.