Harsh Singh Rajput

I am pursuing MBA in pharmaceutical management from NIPER Hyderabad with a strong academic record and proven success in national-level pharmacy entrance exams. I secured AIR 61 in NIPER 2024 (MS/M.Pharm) and AIR 27 in NIPER MBA, along with AIR 147 in GPAT 2024 and AIR 907 in GPAT 2023. I also achieved AIR 6 in AIIMS CRE-2025 for Drug Store Keeper and was selected as a Pharmacist (AIR 61) for ESIC. Additionally, I was the Runner-Up in Round 2 of the EY Case Study Competition. At PharmacyFreak.com, I aim to guide future pharmacists through expert content, exam strategies, and insightful resources based on real experience and academic excellence. Mail- harsh@pharmacyfreak.com

Escitalopram – Mechanism of Action

May 26, 2025May 25, 2025 by Harsh Singh Rajput

Escitalopram mechanism of action – selective serotonin reuptake inhibition and enhanced serotonergic transmission

🔍 Introduction Escitalopram is a widely prescribed antidepressant belonging to the class of Selective Serotonin Reuptake Inhibitors (SSRIs). … Read more

Paracetamol – Mechanism of Action

May 26, 2025May 25, 2025 by Harsh Singh Rajput

Paracetamol mechanism of action – central COX inhibition and antipyretic action via hypothalamus

Introduction Paracetamol (also known as Acetaminophen) is one of the most commonly used drugs for fever and mild-to-moderate … Read more

Methotrexate – Mechanism of Action

May 26, 2025May 25, 2025 by Harsh Singh Rajput

Flowchart of Methotrexate mechanism of action showing DHFR inhibition and suppression of DNA synthesis in S-phase

Introduction Methotrexate is a cornerstone drug in both anticancer chemotherapy and immunosuppressive therapy. Structurally, it is a folic … Read more

Aspirin – Mechanism of Action

May 26, 2025May 25, 2025 by Harsh Singh Rajput

Stepwise mechanism of action of Aspirin showing COX inhibition and antiplatelet effect

Introduction Aspirin, also known as acetylsalicylic acid, is a widely used Non-Steroidal Anti-Inflammatory Drug (NSAID). It’s primarily known … Read more

Classification of Antidiarrheal Drugs

July 4, 2025April 21, 2025 by Harsh Singh Rajput

Drugs For Diarrhea

🔍 What Are Antidiarrheal Drugs? Antidiarrheal drugs reduce the frequency and urgency of stools. They work by: 📊 … Read more

Classification of Antitubercular Drugs

May 23, 2025April 21, 2025 by Harsh Singh Rajput

classification of Antitubercular drugs

🔬 What Are Antitubercular Drugs? Antitubercular drugs are antibiotics specifically used to treat tuberculosis. They work by either … Read more

Classification of Cephalosporins

May 23, 2025April 21, 2025 by Harsh Singh Rajput

classification of cephalosporins

🔬 What Are Cephalosporins? Cephalosporins are bactericidal antibiotics, meaning they kill bacteria by inhibiting cell wall synthesis. They … Read more

Classification of Sulfonamide and Quinolones

July 4, 2025April 20, 2025 by Harsh Singh Rajput

classification of sulfonamides and quinolones

What Are Sulfonamides? Sulfonamides, also known as sulfa drugs, are among the oldest classes of synthetic antimicrobial agents. … Read more

Classification of Antibacterial Drugs

July 4, 2025April 20, 2025 by Harsh Singh Rajput

classification of antibacterial drugs

Classification Based on Mechanism of Action Antibacterial drugs are mainly classified by how they act inside the body. … Read more

Classification of Anti-Cancer Drugs (3)

July 4, 2025April 20, 2025 by Harsh Singh Rajput

Classification of Anti-Cancer Drug (3)

What Are Targeted Anti-Cancer Drugs? Targeted drugs act on specific parts of cancer cells. These drugs block the … Read more