Table 1.

Chromatographic conditions for determination of benzydamine, tolfenamic acid and betahistine. The mobile phase for BZ and BET was a mixture of Phase A and Phase B (80:20). pH was adjusted to 10.5 with triethyl amine.

Model Drug	Mobile Phase		UV Detection	Retention Time (min)
	Phase A	Phase B
Benzydamine	water	acetonitril	260 nm	4.01 ± 0.10
Betahistine	water	acetonitril	307 nm	4.04 ± 0.10
Tolfenamic acid	60% acetonytril with 0.1% formic acid		280 nm	7.39 ± 0.11