|AB: Amlodipine base, ABS: Amlodipine besylate, AMS: Amlodipine maleate HPBC: Hydroxyl Propyl β-Cyclodextrin

Figure 2: AB1, AB2, AB3, ABS1, ABS2, ABS3, AMS1, AMS2 and AMS3 are the FTIR spectra obtained from the amlodipine base and its besylate and maleate salts whereas AB4, AB5, AB6, ABS4, ABS5, ABS6, AMS4, AMS5 and AMS6 are the FTIR spectra obtained from their inclusion complexes with HPBC (by solvent evaporation method at 1:3 molar ratio) respectively at their respective wavelengths.