Formulation and In Vitro Evaluation of Bilayer Tablets of Nebivolol Hydrochloride and Nateglinide for the Treatment of Diabetes and Hypertension

Table 8

Characteristic peak of Nebivolol pure drug and optimized formula.

Functional groups	Reported value (cm^−1)	Observed value (cm^−1); Pure drug	Observed value (cm^−1); Optimized formula
COOH	3300–2500	3195.59	3196.12
Nitro compounds	1550–1475	1493.30	1493.05
Alkyl halides	1300–1150	1214.62	1215.17
Aliphatic amines	1250–1020	1074.87	1074.47