Development of New Method for Simultaneous Analysis of Piracetam and Levetiracetam in Pharmaceuticals and Biological Fluids: Application in Stability Studies

Table 6

Long term and real time stability studies by proposed method.

Test (claimed content)	Interval
	Initial	1st month	2nd month	3rd month	4th month	5th month	6th month	Mean result	%RSD
Studies at accelerated condition (40°C + 75% H)
PC (10 mg/5 mL)	99.68	100.76	99.96	99.45	98.26	98.43	98.25	99.255	0.979
LTC (10 mg/5 mL)	100.27	100.44	98.48	98.37	97.87	97.81	97.55	98.684	1.203
Stability studies at long term (30°C + 65% H)
PC (10 mg/5 mL)	99.68	100.55	100.85	100.94	99.83	99.79	99.47	100.15	0.603
LTC (10 mg/5 mL)	100.27	100.62	99.78	98.38	98.18	98.04	97.96	99.032	1.159