Table 4.

Analysis of cetirizine commercial pharmaceutical preparations.

Pharmaceutical Preparation x	Label Claim	Recovery ± SD (%) y
		(S)-Cetirizine	(R)-Cetirizine	Paraben M	Paraben P
ZYRTEC® coated tablets	10 mg per tablet	99.80 ± 0.53	99.83 ± 0.55	n.d. z	n.d. z
ZYRTEC® drops	10 mg·mL−1	98.65 ± 0.81	98.68 ± 0.83	98.52 ± 0.74	98.00 ± 0.85
ZYRTEC® oral solution	1 mg·mL−1	98.00 ± 0.60	98.10 ± 0.64	99.26 ± 0.85	98.77 ± 0.82

^x Marketed by: Vedim Sp. z o.o., Warszawa, Poland; ^y Average of three determinations; ^z n.d.—not determined