Saziye Erdogan won a gold medal in the 45 kilograms snatch category and a silver medal in the clean and jerk category after lifting 77 and 92 kilograms.
The Taiwanese weightlifter was informed last year that she had tested positive for a banned substance, but the news was not made public until this week.
The weightlifters were provisionally suspended after reanalysis of urine samples provided during the London Olympics. Of the five, only Ukraine's Oleksiy Torokhtiy stands to lose his title.
Lifting weights heavier than themselves, the group of around 20 women are flexing their muscles in a country where sport has long been the domain of men.
The head of Iran's Weightlifting Federation says it is ready to support women weightlifters in domestic and international competitions.
Triple Olympic gold medal winner Naim Suleymanoglu, known as the "Pocket Hercules," died in a hospital in Istanbul having recently undergone a liver transplant.
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