Pharmacom Labs puts an -os suffix on its oral products, and this is the oxandrolone entry: 10 mg tablets, fifty to a pack. Every carton carries a unique code that can be checked against the manufacturer's own verification page, which is the feature that most distinguishes its packaging.
Oxandrolone is one of the few orally active anabolic steroids that cannot aromatise, having been derived from dihydrotestosterone rather than testosterone. Developed at the start of the 1960s, it spent many years in clinical use for restoring weight lost to illness or injury before it became known outside medicine.