I mostri (also known as Opiate ’67 or, in a shortened version, 15 from Rome) is a 1963 Italian commedia all’italiana film directed by Dino Risi. It was made in collaboration with France.
In Italy, the film was a big hit. In Spain, it was censored. I nuovi mostri (Viva Italia! ), an Academy Award contender sequel, was released in 1977.