[Cannabis and adolescents in Spain: use and consequences. State of play].

Objective: The use and abuse of cannabis produces lifelong socio-health consequences. However, there is a great movement towards its legalization. The purpose of this study was to assess the evolution of the prevalence of drug use in the young population in Spain, as well as the impact it currently has on our social and health care system.

Molecular imaging techniques to study the biodistribution of orally administered (99m)Tc-labelled naive and ligand-tagged nanoparticles.

Purpose: Study by molecular imaging the biodistribution of poly(anhydride) nanoparticles after oral administration.

Procedures: Poly (anhydride) nanoparticles (NP) and cyclodextrin-tagged nanoparticles (CD-NP) were radiolabelled with (99m)Tc. Radiochemical purity was measured with a double-solvent chromatography system and the absence of undesirable components was confirmed by size and polydispersion measurement of the technetium-labelled nanoparticles by photon correlation spectroscopy.