@article {1358, title = {Potential Activity of Medicinal Plants as Pain Modulators: A Review}, journal = {Pharmacognosy Journal}, volume = {13}, year = {2021}, month = {January 2021}, pages = {248-263}, type = {Review Article}, chapter = {248}, abstract = {

This review aims to demonstrate the relevance that medicinal plants and their promising results have in prevention and treatment of pain. The neurophysiological bases of pain have been analyzed and the potential mechanisms of action have been proposed, it has also been determined that the main experimental models used for the evaluation of the analgesic potential are: acetic acid-induced writhing test, formalin test, hot-plate test, capsaicin-induced nociception, cinnamaldehyde-induced nociception, glutamate-induced nociception, tail{\textendash}flick test and tail immersion test. There are countless medicinal plants with potential analgesic activity, in some of them main responsible compounds for the activity are flavonoids (vitexin, quercetin, naringenin, astragalin, eupatilin), alkaloids (scotanamine B, bullatine A, S-(+)- dicentrine, stephalagine, lappaconitine), terpenoids (p-cymene, thymol, menthol, citronellol, myrcene, carvacrol, linalool) and saponins (siolmatroside I, cayaponoside D, cayaponoside B4, cayaponoside A1); however, all studies have only been carried out up to pre-clinical stages. Therefore, it is recommended to carry out kinetic studies of the most remarkable natural compounds, evaluate mixtures of active compounds for diminishing doses to avoide possible side effects, and continue with clinical studies of medicinal plants whose safety has already been reported.

}, keywords = {Analgesic, Antinociceptive, Extract, Natural product, Pain}, doi = {10.5530/pj.2021.13.35}, author = {Carmen R Silva-Correa and Jorge L Campos-Reyna and V{\'\i}ctor E Villarreal-La Torre and Abhel A Calder{\'o}n-Pe{\~n}a and Mar{\'\i}a V Gonz{\'a}lez Blas and Cinthya L Aspajo-Villalaz and Jos{\'e} L Cruzado-Razco and William Antonio Sag{\'a}stegui- Guarniz and Luz M Guerrero-Espino and Julio H} } @article {887, title = {In vivo Comparative Anti-Inflammatory and Analgesic Activities of Root Bark, Stem and Leaf Extracts of Capparis erythrocarpus (Capparaceae)}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {May 2019}, pages = {515-520}, type = {Original Article}, chapter = {515}, abstract = {

Introduction: The root bark powder of the medicinal plant Capparis erythrocarpus is used at the Centre for Plant Medicine Research (In Ghana) against inflammatory pain disorders. The whole plant is destroyed to obtain the root bark which constitutes only 11.1 \% of the plant. Hence, the plant is going extinct. We therefore sought to evaluate anti-inflammatory and analgesic activities of the root bark, stem and leaf of C. erythrocarpus in order to explore them as substitute(s) anti-inflammatory and analgesic agent to the root bark. Methods: Carrageenan induced paw oedema assay was used to evaluate anti-inflammatory activity. Hot plate and acetic acid induced writhing assays were employed to ascertain analgesic activity. Results: The extracts of the root bark (CRB) and leaf (CL) produced significant (p\<0.05) antiinflammatory activity of 48.93 and 37.42 \% at 50 and 200 mg/kg p.o. respectively whereas the stem extract (CS) was inactive. Moreover, the extracts produced significant (p\<0.05) analgesic activity. The analgesic activity (178.20 {\textendash} 248.70 \%) of the extracts were higher than that of morphine (136.70\%) at 5 mg/kg i.m. in the hot plate assay. CS (200 mg/kg p.o.) produced the highest analgesic activity (54.61\%) among the extracts and diclofenac sodium (41.15\%) at 5 mg/kg p.o. in the writhing assay. Conclusion: These results indicates that the leaf of C. erythrocarpus can be substituted for the root as analgesic and anti-inflammatory agent. Whiles, the stem can also be used as analgesic agent. This will save the plant from extinction.

}, keywords = {Hot plate, Oedema, Pain, Phytochemical constituents, Writhing assay}, doi = {10.5530/pj.2019.11.82}, author = {Emmanuel Kofi Kumatia and Stephen Antwi and Henry Brew-Daniels and Alfred Ampoma Appiah and Augustine Ocloo} }