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Aims: Bark of different fractions of Sonneratia caseolaris (Linn.) (Sonneratiaceae) were screened for its analgesic, anti-inflammatory and CNS activities. Study Design: For the purpose of these experiments the extracts were subjected to an in-vivo study. Original Research Article Munira et al.; JPRI, 29(5): 1-11, 2019; Article no.JPRI.50813 2 Place and Duration of Study: The study was carried out in August 2014 in the Department of Pharmacy, Southeast University, Dhaka, Bangladesh. Methodology: Ethanolic (ETF), ethyl acetate (EAF), chloroform(CLF) and pet ether (PTF) fractions of bark of S. caseolaris were used to evaluate the analgesic activity using Acetic acid induced writhing and Formalin test. The same fractions were evaluated for anti-inflammatory activity using Carrageenan induced hind paw edema model. The CNS depressant activity was evaluated by Hole cross method. Two doses of 150 mg/kg and 300 mg/kg were used. Results: The different fractions produced significant (p<0.05) writhing inhibition at both doses and reduced the number of linking induced by formalin. Among these fractions the most potent activity was found in ETF about 79.40% (300 mg/kg) that was almost similar to standard Diclofenac-Na 82.78% (10 mg/kg), then EAF 74.59% followed by CLF 59.03% and PTF 52.45% at dose 300 mg/kg). In formalin-induced paw licking model, all fractions of S. caseolaris showed superior result in the late phase compare to the early phase .The same fractions of extracts caused significant (p<0.05) inhibition of carrageenan induced paw edema in a dose dependent manner. A statistically significant (p<0.05) locomotor activity was also observed. Conclusion: Our result revealed that all the extractives of S. caseolaris have noticeable analgesic, anti-inflammatory and CNS depressant activities.

journal of pharmaceutical research international

Pharmacological Screening for CNS Depression, Analgesic and Anti-inflammatory Potentials of Sonneratia caseolaris (Linn.) Barks in Different Solvent Fraction