Loss of cognitive ability

I’m 64 with lifelong sleep problems. I recently switched from 10mg of Valium every night, and sometimes a Benedryl or two, to one serving (1 tablespoon of micronized Kalm boron added to decaf tea) every night. It’s been a godsend. Always after I’ve eaten and showered. That happy, blissful drowsy state, leading right to bed and a good nights sleep.

It’s been almost 3 weeks, and I’m suddenly presenting with diminished cognitive function. Not being able to recall the words for things and people’s names.

Since I’m old anyway, it may be worth the trade off anyway, but could this be a side effect of the kava? You may say I’m taking too much, but it’s one serving and anything less would not work. Maybe it’s the daily use, but if so it’s depressingly back to Valium and Benedryl.