Development and Validation of a Reversed-Phase HPLC Method for the Estimation of Zolpidem in Bulk Drug and Tablets

Table 5

Data from the analysis of commercial tablets by HPLC and UV method.

Company	HPLC method		UV method
	mg/tab	Recovery %	mg/tab	Recovery %
Hexal^a	10.08	100.7	10.10	100.9
Sandoz^a	10.60	105.5	10.16	101.7
Aboreyhan^b	5.06	101.3	5.30	105.6
Amin^b	5.23	104.6	5.20	104.0
Bakhtar bio shimmy^b	4.93	98.7	5.30	105.6
Jalinous^b	4.94	98.8	5.07	101.5
kish medi pharma^b	5.10	102.2	5.12	102.6
kimidaro^b	4.99	99.9	5.50	109.9
loghman^b	5.50	109.7	5.47	109.5
Osvah^b	5.20	103.3	4.94	98.8

Nominal concentration of each company was 20 μg mL⁻¹.
^aNominal mg per tab of these companies (Germany) was 10 mg.
^bNominal mg per tab of these companies was 5 mg.