The important aspects of nutrition, drugs and vaccines are explained in a simple manner so that it will be easily understood. Combination of drugs can be dangerous and should be avoided as far as possible. The indications, contraindications, adverse effects of various medicines and vaccines are discussed in detail which will be helpful for the monitoring of patients. Designed for medical students which will help them to understand various facts in nutrition such as positive and negative aspects of nutrition, feeding and various other nutritional factors. Basics of x-rays and radiological features of various clinical conditions are discussed in detail. Indications, contraindications and adverse effects of various medicine and vaccines are discussed in detail. Mnemonics for easy remembrance and recollection.