The weightlifting competition at the 1988 Summer Olympics in Seoul consisted of ten weight classes, all for men only.
Medal summary
Mitko Grablev (56 kg) and Angel Guenchev (67.5 kg) of Bulgaria originally won their respective weight classes, but were both disqualified after they tested positive for Furosemide. Andor Szanyi of Hungary was originally awarded silver in the 100 kg event, but was disqualified after he tested positive for Stanozolol.
References
Weightlifting at the 1988 Summer Olympics Wikipedia(Text) CC BY-SA