Glass bottle half-full of 25 mg Fortral tablets (pentazocine hydrochloride). 84 mm x 45 mm x 30 mm, 97g. Produced by Winthrop, English, 1960-1985. Glass bottle half-full of 25 mg Fortral tablets (pentazocine hydrochloride). 84 mm x 45 mm x 30 mm 1960-1985