In this work we refer the properties of water solution of ciprofloxacin confined in single wall carbon nanotubes. Ciprofloxacin is well-known antibiotic applied against Gram-positive and Gram-negative bacteria. We study the influence of the size of nanotubes and their structure on interactions with the drug water solution. Analysis of Raman spectroscopy of the carbon nanotubes shows that the higher amorphousness of carbon nanotubes, which increase bio-capability of materials, is associated with their semiconductor’s properties. We used FT-IR spectroscopy to define the structure of confined ciprofloxacin, and we can assume what vibrations of functional group in the ciprofloxacin molecule have been suppressed by confining in the pores. ciprofloxacin, carbon nanotubes, drug delivery, raman spectroscopy, FT-IR.