each table contains pentazocine hcl equivalent to 25 mg pentazocine base. each ml of ampoule contains pentazocine base 30 mg as the lactate and sodium chloride 2.8 mg in water for injection.the ph of sosegon solutions is adjusted between 4 and 5 with sodium hydroxide. sosegon,brand of pentazocine,is a member of the benzazocine series.it occurs as a white crystalline substance