Formulation and evaluation of isosorbide dinitrate-loaded flash-release dispersible sublingual wafers Shivakumar H. Nanjappa, Vanita Somasekhar, Megha Kamath, Sanjana S. Prakash, Avichal Kumar, et al. Rsc Pharmaceutics, 2026 This study aimed to design flash-release dispersible sublingual wafers of isosorbide dinitrate (ISDN) by lyophilisation (LYO) by applying the principles of Quality by Design (QbD).
A Comprehensive Analysis of Andrographis paniculata Herbal Products Conducted to Enhance Potency and Ensure Safety Through the Application of Pertinent Chromatographic Techniques. Tamilvanan K, P.V Murali Krishna, Vanita Somasekhar, Rajeshkumar R Research Journal of Pharmacy and Technology, 2026 The study aimed to identify and quantify andrographolides in various marketed samples of A. Paniculata and detect pesticide residues. It aimed to improve understanding of the composition, purit, and safety.The TLC technique used an aluminium plate with pre-coated silica gel (E. Merck – Silica Gel 60F254). Samples were spotted using a Linomat IV syringe TLC applicator (CAMAG) and a solvent system consisting of acetone, benzene, and chloroform (20:20:10 ratio). With a LiChrospher 100 RP-18e (5μm) column, a quaternary pump, UV detector, auto injector, column oven, and LC-Solution software, the HPLC system comprised a SHIMADZU LC-2030C Liquid Chromatograph. The Agilent Gas Chromatograph with Electron Capture and Nitrogen Phosphorus Detector 7890A-ECD/NPD (EZ Chrome) and associated equipment, along with a Zebron ZB-1 column (30 m in length, 0.25 mm in diameter, and 0.50 m film thickness), made up the GC-ECD system.The TLC results showed well-developed andrographolide spots in all samples, with sample C having the highest percentage. HPLC quantification confirmed this, with sample C exhibiting the highest total andrographolide content. GC-ECD analysis detected pesticide residues in A. paniculata samples. This comprehensive chromatographic analysis enhances our understanding of A. paniculata composition and purity, ensuring potency and safety in herbal products. These findings provide valuable insights for quality control in A. paniculata-based formulations.Our research emphasises the safety and therapeutic potential of Andrographis paniculata, underscoring its importance in contemporary medicine. By using cutting-edge methods for thorough study, we were able to verify its effectiveness against several diseases.
DEVELOPMENT OF A DISCRIMINATORY METHOD FOR DETERMINATION OF IN VITRO DISSOLUTION OF CILNIDIPINE Vanita Somasekhar, Tejashwini H, Murali krishna PV Asian Journal of Pharmaceutical and Clinical Research, 2024 Objectives: This study involves the development of a discriminatory method to differentiate the in vitro dissolution of cilnidipine’s mouth-dispersing film from that of a commercial tablet. Methods: The mouth-dispersing film was initially developed using a reported established method. A discriminatory dissolution method was developed to assess the in vitro dissolution of the mouth-dispersing film and compare the same with that of the commercial tablet. Results: The study findings indicated the method employed was able to differentiate the dissolution of the fast-dissolving film from the commercial tablet. About 98.52±0.60% of the drug was found to be released from the oral film in 40 min whereas the tablet took nearly 5 h for 92.06±0.49% of the drug to get released. Conclusion: These results demonstrate that the dissolution media identified was able to create the necessary sink condition that would be able to differentiate the dissolution profile of the mouth-dispersing film from the conventional tablet. The ultrasound spectrophotometric method employed was found to be simple rapid and sensitive enough to estimate the drug release from diverse pharmaceutical dosage forms.
Development and Validation of High-Performance Thin Layer Chromatographic Method for Estimation of Acyclovir Pai Raksha, Somasekhar Vanita, Purushottaman Vijayanthimala, Chandran Athira Indian Journal of Pharmaceutical Education and Research, 2024 Background: The antiviral medication genre comprises the synthetic purine nucleoside analogue acyclovir, which particularly is used to treat varicella-zoster and herpes simplex virus infections. By incorporating into viral DNA to stop further synthesis, acyclovir limits DNA synthesis and viral multiplication. The investigation of an economical alternative was spurred by the existence of the currently used HPLC and UV techniques for acyclovir analysis, which are recognized for their solvent-intensive character. The innovation offers a more cost-effective method of pharmaceutical analysis along with improving sustainability. Materials and Methods: Using a CAMAG Linomat 5 sampler, the samples were spotted in the form of bands on a precoated silica gel plate using a CAMAG microliter syringe. The application rate was kept constant at 100 nL/sec and the spacing between the tracks was set. Chloroform, ethanol, isopropyl alcohol and strong ammonia (2:4:3:1 v/v/v/v) constitute the mobile phase. The development process was linear ascending in a twin trough glass chamber that was saturated with a mobile phase. To estimate acyclovir, densitometric scanning was carried out in the absorbance mode at 254 nm. Results: With r 2 =0.9974, the calibration plots' linear regression analysis results demonstrated a strong linear association. The limit of quantification was 11.7726 µg/mL, whereas the limit of detection was 3.884 µg/mL. Conclusion: According to statistical analysis of the data, the approach was found to be precise, accurate, repeatable, sensitive and selective for the analysis of acyclovir. The technique will work well for routine quality control when estimating acyclovir as a bulk medication.
Synthesis of 2-N-acylamino-4-arylthiazole-5-acetic acids/esters for their anti-inflammatory and analgesic activities Asian Journal of Chemistry, 2004
An unexpected reaction in the synthesis of 3-substituted thienoazetidinones Asian Journal of Chemistry, 2003
An oxidative spectrophotometric method for the determination of clprofloxacln in pharmaceutical preparations Indian Drugs, 1997
RECENT SCHOLAR PUBLICATIONS
Activation-modulated stimuli-responsive systems: an intelligent platform for site-specific gastroretentive delivery of diverse therapeutic agents HN Shivakumar, R Shinde, V Somasekhar, MG Hariprasad, NM Mahesh International Journal of Pharmaceutics, 126599 , 2026 2026
Formulation and evaluation of isosorbide dinitrate-loaded flash-release dispersible sublingual wafers SH Nanjappa, V Somasekhar, M Kamath, SS Prakash, A Kumar, R Pai, ... RSC Pharmaceutics , 2026 2026
Gymnema sylvestre saponins: Analytical profiling for herbal pharmaceutical standards V Somasekhar, R Pai, P Ns, D Reddy M Journal of Liquid Chromatography & Related Technologies 48 (16-20), 558-564 , 2025 2025
Shilajit-analytical study to understand the phyto complex present in shilajit raw material, extract and resin by using hyphenated techniques HK Kohli, V Somasekhar, MD Reddy, NS Prakash Journal of Chromatography A, 466570 , 2025 2025
An AQbD driven stability indicating HPLC method for simultaneous estimation of lamivudine, tenofovir disoproxil fumarate and efavirenz in plasma A Kumar, V Somasekhar, S Dhiman, SH Nanjappa, D Avlani Analytical Methods 17 (9), 2094-2111 , 2025 2025 Citations: 2
Development and Validation of High-Performance Thin Layer Chromatographic Method for Estimation of Acyclovir. P Raksha, S Vanita, P Vijayanthimala, C Athira Indian Journal of Pharmaceutical Education & Research 58 , 2024 2024
RP-HPLC Method Development and Validation of Choline Salicylate and Lignocaine HCl in Mouth Ulcer Gel. S Boopalan, PVM Krishna, V Somasekhar, V Dubalgundi, S Devadiga Indian Journal of Pharmaceutical Education & Research 58 , 2024 2024 Citations: 1
DEVELOPMENT OF A DISCRIMINATORY METHOD FOR DETERMINATION OF IN VITRO DISSOLUTION OF CILNIDIPINE V SOMASEKHAR, H TEJASHWINI, MK PV DEVELOPMENT 17 (2) , 2024 2024
Preparation and Characterization of Directly Compressible Spherical Agglomerates of Etoricoxib. HN Shivakumar, V Somasekhar, A Roy Indian Journal of Pharmaceutical Education & Research 54 (4) , 2020 2020 Citations: 3
SYNTHESIS AND EVALUATION OF ANTI-PROLIFERATIVE ACTIVITY OF NOVEL THIAZOLIDINONE DERIVATIVES V Somasekhar, R Udainiya, S Kumar INTERNATIONAL JOURNAL OF PHARMACEUTICAL SCIENCES AND RESEARCH 9 (8), 3449-3453 , 2018 2018
Comparative antioxidant and bioavailability studies of Vitamin C in Phyllanthus emblica Linn. and its combinations with Piper nigrum Linn. and Zingiber officinale Roscoe V Somasekhar, P Ashok, SAR Kameswari, R Rajendran, R Singh Brazilian Journal of Pharmaceutical Sciences 52, 35-43 , 2016 2016 Citations: 13
Optimization and validation of an RP-HPLC method for the estimation of 6-mercaptopurine in bulk and pharmaceutical formulations V Somasekhar Brazilian Journal of Pharmaceutical Sciences 50, 793-797 , 2014 2014 Citations: 8
HPLC Method for the simultaneous determination of paracetamol, aceclofenac and tizanidine hydrochloride V Somasekhar, D Gowrisankar Asian Journal of Research in Chemistry 23 (4), 1651-1654 , 2011 2011 Citations: 9
Development and validation of an RP-HPLC method for estimation of famciclovir in bulk and pharmaceutical formulations V Somasekhar, D Gowrisankar Current Pharma Research 1 (3), 227-231 , 2011 2011 Citations: 2
Isolation, characterization and pharmacological studies of a flavonol glucoside from trichilia connaroides (w. &a.) Bentilizen D Meharoon KLE University, Belagavi, Karnataka , 2011 2011
Development and Validation of a Rapid RP‐HPLC Method for the Estimation of Esmolol Hydrochloride in Bulk and Pharmaceutical Dosage Forms V Somasekhar, DG Sankar Journal of Chemistry 7 (3), 807-812 , 2010 2010 Citations: 5
Development and Validation of a Rapid RP‐HPLC Method for the Determination of Venlafaxine Hydrochloride in Pharmaceutical Dosage forms using Experimental Design V Somasekhar, D Gowrisankar, HN Shivakumar Journal of Chemistry 6 (4), 1091-1102 , 2009 2009 Citations: 23
Screening of Venlafaxine Hydrochloride for Transdermal Delivery : Passive Diffusion and Iontophoresis VS 7. Gurusharanjit Sigh, Bijaya Ghosh, Dave Kaushalkumar D AAPSPharmSciTech 9 (3), 791-797 , 2008 2008 Citations: 31
Synthesis of 2-N-Acylamino-4-Arylthiazole-5-Acetic acids/esters for Their Anti-inflammatory and Analgesic Activities M Attimarad, V Somasekhar, S Mohan Asian Journal of Chemistry 16 (1), 179 , 2004 2004 Citations: 1
An unexpected reaction in the synthesis of 3-substituted thienoazetidinones J Saravanan, V Somasekhar, S Mohan Asian Journal of Chemistry 15 (3), 1749 , 2003 2003 Citations: 2
MOST CITED SCHOLAR PUBLICATIONS
Screening of Venlafaxine Hydrochloride for Transdermal Delivery : Passive Diffusion and Iontophoresis VS 7. Gurusharanjit Sigh, Bijaya Ghosh, Dave Kaushalkumar D AAPSPharmSciTech 9 (3), 791-797 , 2008 2008 Citations: 31
Development and Validation of a Rapid RP‐HPLC Method for the Determination of Venlafaxine Hydrochloride in Pharmaceutical Dosage forms using Experimental Design V Somasekhar, D Gowrisankar, HN Shivakumar Journal of Chemistry 6 (4), 1091-1102 , 2009 2009 Citations: 23
Comparative antioxidant and bioavailability studies of Vitamin C in Phyllanthus emblica Linn. and its combinations with Piper nigrum Linn. and Zingiber officinale Roscoe V Somasekhar, P Ashok, SAR Kameswari, R Rajendran, R Singh Brazilian Journal of Pharmaceutical Sciences 52, 35-43 , 2016 2016 Citations: 13
HPLC Method for the simultaneous determination of paracetamol, aceclofenac and tizanidine hydrochloride V Somasekhar, D Gowrisankar Asian Journal of Research in Chemistry 23 (4), 1651-1654 , 2011 2011 Citations: 9
Optimization and validation of an RP-HPLC method for the estimation of 6-mercaptopurine in bulk and pharmaceutical formulations V Somasekhar Brazilian Journal of Pharmaceutical Sciences 50, 793-797 , 2014 2014 Citations: 8
Development and Validation of a Rapid RP‐HPLC Method for the Estimation of Esmolol Hydrochloride in Bulk and Pharmaceutical Dosage Forms V Somasekhar, DG Sankar Journal of Chemistry 7 (3), 807-812 , 2010 2010 Citations: 5
Preparation and Characterization of Directly Compressible Spherical Agglomerates of Etoricoxib. HN Shivakumar, V Somasekhar, A Roy Indian Journal of Pharmaceutical Education & Research 54 (4) , 2020 2020 Citations: 3
An AQbD driven stability indicating HPLC method for simultaneous estimation of lamivudine, tenofovir disoproxil fumarate and efavirenz in plasma A Kumar, V Somasekhar, S Dhiman, SH Nanjappa, D Avlani Analytical Methods 17 (9), 2094-2111 , 2025 2025 Citations: 2
Development and validation of an RP-HPLC method for estimation of famciclovir in bulk and pharmaceutical formulations V Somasekhar, D Gowrisankar Current Pharma Research 1 (3), 227-231 , 2011 2011 Citations: 2
An unexpected reaction in the synthesis of 3-substituted thienoazetidinones J Saravanan, V Somasekhar, S Mohan Asian Journal of Chemistry 15 (3), 1749 , 2003 2003 Citations: 2
RP-HPLC Method Development and Validation of Choline Salicylate and Lignocaine HCl in Mouth Ulcer Gel. S Boopalan, PVM Krishna, V Somasekhar, V Dubalgundi, S Devadiga Indian Journal of Pharmaceutical Education & Research 58 , 2024 2024 Citations: 1
Synthesis of 2-N-Acylamino-4-Arylthiazole-5-Acetic acids/esters for Their Anti-inflammatory and Analgesic Activities M Attimarad, V Somasekhar, S Mohan Asian Journal of Chemistry 16 (1), 179 , 2004 2004 Citations: 1
Activation-modulated stimuli-responsive systems: an intelligent platform for site-specific gastroretentive delivery of diverse therapeutic agents HN Shivakumar, R Shinde, V Somasekhar, MG Hariprasad, NM Mahesh International Journal of Pharmaceutics, 126599 , 2026 2026
Formulation and evaluation of isosorbide dinitrate-loaded flash-release dispersible sublingual wafers SH Nanjappa, V Somasekhar, M Kamath, SS Prakash, A Kumar, R Pai, ... RSC Pharmaceutics , 2026 2026
Gymnema sylvestre saponins: Analytical profiling for herbal pharmaceutical standards V Somasekhar, R Pai, P Ns, D Reddy M Journal of Liquid Chromatography & Related Technologies 48 (16-20), 558-564 , 2025 2025
Shilajit-analytical study to understand the phyto complex present in shilajit raw material, extract and resin by using hyphenated techniques HK Kohli, V Somasekhar, MD Reddy, NS Prakash Journal of Chromatography A, 466570 , 2025 2025
Development and Validation of High-Performance Thin Layer Chromatographic Method for Estimation of Acyclovir. P Raksha, S Vanita, P Vijayanthimala, C Athira Indian Journal of Pharmaceutical Education & Research 58 , 2024 2024
DEVELOPMENT OF A DISCRIMINATORY METHOD FOR DETERMINATION OF IN VITRO DISSOLUTION OF CILNIDIPINE V SOMASEKHAR, H TEJASHWINI, MK PV DEVELOPMENT 17 (2) , 2024 2024
SYNTHESIS AND EVALUATION OF ANTI-PROLIFERATIVE ACTIVITY OF NOVEL THIAZOLIDINONE DERIVATIVES V Somasekhar, R Udainiya, S Kumar INTERNATIONAL JOURNAL OF PHARMACEUTICAL SCIENCES AND RESEARCH 9 (8), 3449-3453 , 2018 2018
Isolation, characterization and pharmacological studies of a flavonol glucoside from trichilia connaroides (w. &a.) Bentilizen D Meharoon KLE University, Belagavi, Karnataka , 2011 2011