TABLE 1.

In vitro susceptibilities to omeprazole, metronidazole, nitazoxanide, and albendazole in drug-susceptible and drug-resistant strains of G. lamblia

Compound	LD50 (μM) for method:
	1			2
	Drug susceptible	Metronidazole resistant	Nitazoxanide resistant	Drug susceptible	Metronidazole resistant	Nitazoxanide resistant
Omeprazole, nonactivated	319.68	385.38	297.66	0.116	0.26	0.544
Omeprazole, acid activated				0.072	0.214	0.127
Metronidazole				1.24	2.9	0.84
Nitazoxanide				0.016	0.172	1.42
Albendazole				0.05	0.118	0.277