I use Kama a lot in my writings. And in traditional Vedic religion this refers more specifically to sexual pleasure, but in general just as pleasure.
I believe Kama to be all pleasures, all equal in value. To each his own works very well here.
This includes indulging in drugs and drinking and so on.
As long as Kama preserves health in such a way that Dharma can be upheld then there is no cost.