The ministry says more than 700,000 doses of anabolic steroids, the blood booster EPO and growth hormones were seized during raids in Madrid, Catalonia, Valencia, Andalusia and the Basque region, the ministry says in a statement.
During the first quarter of 2013 the gangs introduced into Spain some 750 kilogrammes of drugs from China, Greece and Portugal, and marketed them in sports centers and homes, Sunday's statement says.
Spain passed a new anti-doping law on June 13 that it hopes will clean up the country's tarnished image after a high profile trial over doping in cycling. It also hopes to boost Madrid's 2020 Olympics bid.