alcohol.Just about the worst taste on the planet,so grab some of the gelcaps to inject it into if you're planning on using it,otherwise you'll be ready to lose your lunch,lol.
Eythl. get gel caps if you use it. Letrozole is not freely soluable in much. So you cant mix it in anything water based with out the letrozole precipitating. Once settled out, it may stick to the edges of the glass effecting your dose. This + the taste can be avoided with the caps and its cheaper than the pills-Freak