Pharmaceutical concentrate formulations comprising 2-amino-l,3-propanediolcompounds, analogs thereof and salts thereof, particularly 2-amino-2-[2-(4-octylphenyl)ethyl]-propane-1,3-diol or a pharmaceutically acceptable saltthereof in an organic solvent or semi-aqueous solvent and methods foradministration of the undiluted and diluted concentrate are provided.