Rexobol-50 is the heavy end of Alpha Pharma's oral stanozolol line: 50 mg in a single tablet, fifty tablets per box, five times the concentration of the Rexobol-10 sold alongside it. Same compound, same manufacturer, far fewer tablets needed to reach any given amount.
Stanozolol is a 17-alpha-alkylated androgen derived from DHT, with a pyrazole ring in place of the usual 3-keto group. It does not aromatise, and the oral route removes injections entirely. Alpha Pharma prints a code panel on the outer box for checking a unit against the producer's own records.