Table 4.

Application of the proposed method to the analysis of methocarbamol and guaifenesin in their dosage forms

Parameters	Methocarbamol			Guaifenesin
	Conc. taken (µg/mL)	%found	Comparison method [42]	Conc. Taken (µg/mL)	%found	Comparison method [43]
Dosage forms	20.0	100	100.6	5.0	100.2	99.5
	30.0	100	100.1	10.0	100.9	100
	40.0	96.9	99.8	20.0	100.5	99.2
	50.0	97.6	99.2	30.0	100.3	100
	60.0	102.1	100.5	40.0	102.5	100
Mean ± SD		98.97 ± 1.79	100.17 ± 0.4		100.53 ± 0.35	99.56 ± 0.4
t test		0.86 (2.776)*			0.04 (2.776)*
F test		4.41 (6.388)*			1.31 (6.388)*

^∗Tabulated t and F values at p = 0.05[44]