Fitoterapia
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The methanol extract of the leaves of Passiflora incarnata (100 and 200 mg/kg, p.o.) exhibited significant antitussive activity on sulfur dioxide-induced cough in mice, the cough inhibition (39.4 and 65.0%, respectively) being comparable to that of codeine phosphate (10 and 20 mg/kg, p.o., respectively).