Undergraduate medical students’ perception regarding computer assisted learning in experimental pharmacology practical

Background: Main objective of this study was to find out the students’ perception and to obtain feedback towards the use of Animal Simulator to demonstrate drug effects in terms of its acceptability, advantages and disadvantages of Computer Assisted Learning (CAL) in experimental pharmacology practical as an educational tool.Methods: Questionnaire based study, done on randomly and voluntarily selected ninety-six fourth and fifth semester MBBS Students. Divided into four groups and each group contained 24 students. Students were taught experimental pharmacology practical online using Animal simulator (CAL- Computer Assisted Learning) for 2 hours on different days in three sessions. Questions and their feedback was taken during these sessions and presented in tables. Statistical analysis of data was done using Graph Pad software.Results: Majority of students i.e. 64 (66.67%) agreed that in vitro and in vivo experiments on animals are essential for better understanding and learning of the biological process. Students were agreed to the majority of the statements for CAL like enjoyable and time saving, easy to perform, contributes more to understanding theoretical concepts, no experimental error seen, welcome change and best alternative to laboratory practical and many experiments can be demonstrated in a short time. Students were disagreed on statements like CAL is an effective method of teaching practical aspects and preferred experimentation than laboratory practical. Majority of students given yes/positive response to questions showing advantages of using CAL. Also, positive feedback was obtained regarding questions showing disadvantages of using CAL software.Conclusions: Students’ perception regarding practical with CAL laboratory using animal simulator was good. The overall view was expressed that they found the exercises interesting and educationally beneficial. Computer assisted learning is a feasible and very effective teaching and learning method in pharmacology with huge potential to change the way of learning as it meets the majority of the learning objectives.

Students’ attitudes on personal drug selection exercise in writing prescription

Background: This study was developed to know the students’ views regarding personal drug (P-drug) concept in rational prescription of drugs and also giving them training of creating and using personal drug concept.Methods: 40 medical students (5th semester) divided in four groups were involved voluntarily in a three phase, questionnaire based and prospective study. In first and second phase students were taught and asked to derive P-drug using different standard text books and Current Index of Medical Specialties (CIMS) by analyzing efficacy, safety, cost and convenience of drugs used for type II diabetes mellitus. Third phase was designed to know the students’ perception regarding the exercise and difficulties faced in the process of P-drug selection. It contained demographic and 12 questions with answer using Likert scale.Results: Students selected biguanide (metformin) as a P-drug in terms of efficacy, safety, cost and convenience. 95% (36 out of 40) responded in the questionnaire, out of which 92% (33 out of 36) had given answer with mean score ?4. Overall median score was 4 and Interquartile Range was 4-5. 89% (32) strongly agreed that P-dug selection teaching helped them to understand pharmacology better. Majority (83% or 30) were in favour of introducing P-drug selection exercises in undergraduate pharmacology curriculum.Conclusions: P-drug selection exercise helped students to understand the differences among various drugs used for the treatment of type II diabetes mellitus and given them a strong foundation for developing rational use of the medicine in their future career as a doctor.

Students’ attitude toward didactic lecture versus problem-based learning in pharmacology: a questionnaire based study.

Background: The study was conducted to assess student attitude toward learning by didactic lectures versus problem-based learning (PBL). Methods: A questionnaire containing 11 statements was distributed to the students. Statements ranged from general information on lectures and PBL to benefits of lecture-based learning (LBL) over PBL and vice versa. The students were asked to score each individual statement. The median total scores and median with interquartile range of individual statements was calculated. A comparison between questions that support LBL or PBL was performed. Student t-test was employed to compare the mean scores of different groups. Results: Two hundred and seven students participated in this questionnaire study. The individual median total score was 42 when compared with possible total score of 55. There was a statistically significant (p<0.05) difference between the total score (mean±standard deviation) for the questions related to LBL (3.2391±0.05120) and those related to PBL (4.0640±0.05688). Conclusion: The score for PBL was significantly higher than LBL showing that students liked PBL more than LBL.

Study of changes in serum lipid profile and blood sugar level by perindopril and telmisartan during treatment of systemic hypertension.

Background: This study was designed to compare adverse effects on serum lipid profile and blood sugar level in the treatment with two commonly used drugs perindopril and telmisartan in cases of hypertension. This was an “observational” and “cross-sectional” study. Methods: A total of 100 patients were included in each, Groups A and B. In both groups, half the patients were given perindopril 4 mg OD and half were given telmisartan 40 mg OD for 24 weeks. Total cholesterol (TC), high density lipoprotein (HDL), low density lipoprotein (LDL), triglycerides (TG), fasting blood sugar (FBS), and postprandial blood sugar (PPBS) level was estimated initially and then at 4th, 12th, and 24th week. Statistical analysis was done using ANOVA. Results: With perindopril initial means of TC, HDL, LDL, TGs, FBS, and PPBS in Groups A and B were 190.32, 49.76, 117.96, 165.04, 84.56, 122.60, and 188.80, 51.64, 118.52, 159.12, 93.92, 133.60, respectively. After 24 weeks, these values were 190.84, 50.68, 118.60, 163.84, 83.48, 120.20, and 190.96, 52.04, 118.28, 157.56, 93.96, 133.68, respectively (p > 0.05). With telmisartan, initial means of TC, HDL, LDL, TG, FBS, and PPBS in both groups were 188.08, 49.76, 118.84, 167.20, 83.72, 120.68, and 188.08, 46.88, 121.96, 167.84, 91.44, 131.72, respectively. After 24 weeks, these values in both groups were 189.36, 49.80, 120.04, 165.96, 82.60, 118.36 and 186.12, 45.28, 121.08, 167.72, 92.76, 129.56 respectively (p > 0.05). Conclusions: It concluded that both perindopril and telmisartan had not any significant adverse effects on plasma lipid profile and blood sugar level in both groups.

A comparative study of the effect of ondansetron, granisetron and alprazolam on anxiety in wistar rats.

Objective: The study was undertaken to compare the effect of ondansetron, granisetron and alprazolam on anxiety in rats. Materials and Methods: Elevated plus maze and Open field test were used to compare the effect of drugs on anxiety in rats. Six groups of rats were treated with 2% gum acacia orally, alprazolam 0.08mg/kg body weight of the rat orally, ondansetron (0.01mg/kg, 1mg/kg intraperitoneally) and granisetron (0.01mg/kg and 1mg/kg intraperitoneally) respectively. The time spent, number of entries and rears in the arms of the elevated plus maze and central and peripheral areas in the open field test Results: Alprazolam and ondansetron significantly increased (P<0.05) the time spent in open arm of elevated plus maze and central squares in the open field and decreased (P<0.05) the time spent in the closed arm of elevated maze and peripheral squares in the open field as compared to control. There was no significant difference between the effects of alprazolam and ondansetron. Granisetron did not produce any significant effect in any of the models. Conclusion: Ondansetron, but not granisetron, produced anxiolytic activity in rats which was comparable to alprazolam.

Larval susceptibility of Aloe barbadensis and Cannabis sativa against Culex quinquefasciatus, the filariasis vector.

Larvicidal potential of petroleum ether, carbon tetrachloride and methanol extracts of Aloe barbadensis and Cannabis sativa has been investigated against Culex quinquefasciatus. Among the extracts examined, Carbon tetrachloride extract (Cte) of Aloe barbadensis was the most effective with LC50 values of 15.31 and 11.01 ppm after 24 and 48 hr of exposure, respectively followed by pertoleum ether extract (Pee) of A barbadensis, Cte of C. sativa, methanol extract (Mee) of A. barbadensis, methanol and petroleum ether of C. saliva, LC, being 25.97, 88.51, 144.44, 160.78 and 294.42 ppm affer 24hr and 16.60, 68.69, 108.38, 71.71 and 73.32 ppm after 48 hr of post treatment, respectively. Cte of both the plants exhibits potential larvicidal activity and can be used as ecofriendly alternative in the management of the filariasis vector, Culex quinquefasciatus.

Effect of NR-ANX-C (a polyherbal formulation) on haloperidol induced catalepsy in albino mice.

BACKGROUND & OBJECTIVE: Use of typical antipsychotics like haloperidol in treatment of schizophrenia is associated with a high incidence of extrapyramidal side effects. In rodents, administration of haloperidol leads to the development of a behavioural state called catalepsy, in which the animal is not able to correct an externally imposed posture. In the present study we evaluated the anticataleptic efficacy of NR-ANX-C, a polyherbal formulation containing bioactives of Withania somnifera, Ocimum sanctum, Camellia sinensis, triphala and shilajit in haloperidol induced catalepsy in mice. METHODS: Five groups (n = 6) of male albino mice were used in the study. Catalepsy was induced by ip administration of haloperidol (1mg/kg). The degree of catalepsy (cataleptic score) was measured as the time the animal maintained an imposed posture. We compared the anticataleptic efficacy of NR-ANX-C (10, 25 and 50 mg/kg) with scopolamine (1 mg/kg). The superoxide dismutase (SOD) level in brain tissue was also estimated to correlate the levels of oxidative stress and degree of catalepsy in the animal. RESULTS: Significant (P<0.01) reduction in the cataleptic scores was observed in all NR-ANX-C treated groups and maximum reduction was observed in the NR-ANX-C (25 mg/kg) treated group. Significant (P<0.05) reduction in SOD activity was observed in NR-ANX-C (25 and 50 mg/kg) treated groups and maximum reduction was observed in NR-ANX-C (25mg/kg) treated group. INTERPRETATION & CONCLUSION: In our study, maximum reduction in cataleptic score was observed in NR-ANX-C (25 mg/kg) treated group. The maximum reduction in SOD activity was also observed in the same group. These findings suggest a possible involvement of the antioxidant potential of NRANX- C in alleviating haloperidol induced catalepsy.

Comparative efficacy of Solanum xanthocarpum extracts alone and in combination with a synthetic pyrethroid, cypermethrin, against malaria vector, Anopheles stephensi.

With a goal of minimal application of environmentally hazardous chemical insecticides, the larvicidal activity of cypermethrin was studied alone and in combination with the root extract of Solanum xanthocarpum against anopheline larvae. Petroleum ether extract was observed to be the most toxic, with LC,, of 1.41 and 0.93 ppm and LC90 of 16.94 and 8.48 ppm at 24 and 48 hours after application, respectively, followed by carbon tetrachloride and methanol extracts. The values for cypermethrin were an LC50 of 0.0369 ppm after 24 hours and 0.0096 ppm after 48 hours and LC90 of 0.0142 and 0.0091 ppm after 24 and 48 hours, respectively. The ratios of cypermethrin and petroleum ether extracts tested were 1:1, 1:2 and 1:4. Of the various ratios tested, the cypermethrin and petroleum ether extract ratio of 1:1 was observed to be more efficient than the other combinations. From the individual efficacy of each constituent, synergism was noted. This is an ideal ecofriendly approach for the control of malaria vector, Anopheles stephensi.

Larvicidal potential of Nerium indicum and Thuja oriertelis extracts against malaria and Japanese encephalitis vector.

Ethanolic and acetone extracts of Nerium indicum and Thuja orientelis have been studied against III instar larvae of Anopheles stephensi and Culex quinquefasciatus. Ethanolic extract of N. indicum is found more effective than its acetone extract against anopheline larvae with LC50 values of 185.99 and 148.05 ppm for former and 229.28 and 149.43 ppm for the later after 24 and 48 hrs of exposure. The acetone extract with LC50 values of 209.00 and 155.97 ppm is more effective in case of culicine larvae than its ethanolic extract with LC50 494.07 and 194.49 ppm after 24 and 48 hours of treatment. Ethanolic extract of T. orientelis is more effective against both the larval species with LC50 values of 13.10 and 9.02 ppm after 24 and 48 hours for anopheline and 22.74 and 16.72 ppm against culicine larvae. The acetone extract showed LC50 values of 200.87 and 127.53 ppm against anopheline and 69.03 and 51.14 ppm against culicine larvae. Thus ethanolic extract of T. orientelis is an ideal potential larvicide for both types of mosquito larvae.

Evaluation of Solanum xanthocarpum extracts as mosquito larvicides.

Mosquito larvicidal activity of crude carbon-tetra-chloride, methanol and petroleum ether extracts of Solanum xanthocarpum fruits was examined against Anopheles stephensi and Culex quinquefasciatus. Among the extracts tested, carbon-tetra-chloride extract was the most effective with LC50 values of 5.11 ppm after 24 hours and 1.27 ppm after 48 hours of treatment against An. stephensi. In the case of Cx. quinquefasciatus the petroleum ether extract was observed as most toxic with LC50 values of 62.62 ppm after 24 hours and 59.45 ppm after 48 hours of exposure period respectively. It is, therefore, suggested that S. xanthocarpum can be applied as an ideal potential larvicide against An. stephensi and Cx. quinquefasciatus.

Larval susceptibility of Ajuga remota against anopheline and culicine mosquitos.

The objective of the present study is to determine the bioefficacy of different crude extracts of Ajuga remota against anopheline and culicine larvae. Larval susceptibility of crude carbon-tetrachloride, methanol and petroleum-ether extracts of Ajuga remota leaves was observed against the malaria vector, Anopheles stephensi and the filariasis vector, Culex quinquefasciatus. Among the extracts tested, petroleum-ether extract was the most effective with LC50 values of 0.033% after 24 hours and 0.029% after 48 hours of treatment against the larvae of Anopheles stephensi. In the case of the larvae of Culex quinquefasciatus, the carbon-tetra-chloride extract exhibited maximum efficacy with LC50 values of 0.043% after 24 hours and 0.026% after 48 hours of exposure, respectively. It is, therefore, concluded that Ajuga remota can be applied as an ideal larvicide against An. stephensi and Cx. quinquefasciatus.