Are those pharmaceutical drugs or medicines which are used to treat allergic reactions caused by foreign substances such as pollens, dust mite, molds, danders, and foods. Anti allergic drugs act as defense mechanism against foreign invaders, especially infections. These drugs can be consumed in form of tablets, capsules, syrups and drops.

Also known by the name of hypoglycemic agent, anti diabetic drug is used to cure diabetes mellitus. These pharmaceutical drugs lower glucose levels in the blood. A wide variety of anti-diabetic drugs like insulin, exenatide, pramlintide, metformin are easily available in the market. Globally, antidiabetic drug market tantamount to more than $ 13 billion, which is forecasted to reach $ 30 billion by the end of 2014.

Anti-infective drugs comprise of group of those medications, which stops or combat the growth of microorganism without causing any further damages to human body. These drugs interfere with peculiar characteristics of bacteria, virus, fungi, protozoa etc and prevent them from multiplying. Anti-infective medicines are composed of antibacterials, antifungals, anti malarial, leprosy drugs, anti microbial, cephalosporin or antivirals.

Antihistamines consists of those medicines that are mainly taken for preventing and treating allergies, itching, flu, cold, hayfever and symptoms of insect bites or stings. Basically, antihistamines are of two types: sedating and non-sedating. These medicines should be taken only after consulting a recognized doctor or pharmacist. The problems that can be treated with the help of antihistamines are glaucoma, epilepsy, porphyria, prostate, urine, liver of kidney related disorders.

Antineoplastic agents are used for restricting or hindering the growth of neoplasms within the body. These agents check the maturation and growth of malignant cells and prevent them from getting damaged. Antineoplastic agents are a group of drugs that are primarily taken for treating and controlling different types of tumors or cancers multiplying within the human body. Some of the common and well-recognized antineoplastic agents are flurorouracil, methotrexate, paclitaxel, cyclophosphamide and doxorubicin. The antineoplastic agents can be given to patients either in combination with other drugs or alone.

A group of medications that are particularly used for treating, curing and controlling viral infections are called anti viral drugs. These drugs stimulate the immune system of a human body and block the process through which virus reproduce rather than killing them. Anti virals out in the market comes in various forms like capsule, pill, tablet, ointment, cream, liquid and injections. The commonly used anti viral drugs are flumadine, acyclovir, amantidine, ganciclovir, and valacyclovir.

It is that type of drug, which is specifically used to kill neoplastic cells. These pharmacy drugs can be used to treat different types of cancers such as colon rectum, breast, stomach, head, neck, liver, brain, skin, testicular, bone, pancreatic etc. The worldwide cancer drugs market is equivalent to $ 24 billion, which is forecasted to cross $ 55 billion by the end of year 2009.

Includes whole ensemble of drugs, which are given to patients suffering from heart, related disorders. Commonly used cardiovascular drugs are antiarrhythmic agent, antithrombotic agents, vasoconstrictor etc. Presently, the market size of the cardiovascular drugs is more than US $ 75 billion.

Central nervous system drugs constitute of variety of depressants and stimulants that are used for treating and curing different types of maladies like parkinson, alzheimer, depression, psychoses, epilepsy, anxiety, migraine and other neurological disorders. Stimulants basically increase mental and physical processes while depressants lessen the activity of the central nervous system. Commonly available central nervous system drugs are sedative, ergot derivative, anti convulsants, antidepressant, antiemtic etc.

A group of medicinal drugs that are used for treating and curing cough related syndromes in a human being are termed as cough medicines. Basically, there are three types of over-the counter medications available for giving relief to the cough. These cough drugs include suppressants, topical medicines and oral expectorants. The combination of these drugs can also give relief to several other cold symptoms like congestion, throat infection, coughs, headache and body ache.

Often termed as hormonal drugs, these medicines are especially produced for treating thyroid, parathyroid, enteropancreatic, pituitary tumors and other endocrine related diseases. These drugs check the overproduction and underproduction of natural hormones within the human body. Corticotropin, somatropin, antithyroid, oxytocin, testosterone, terbutaline, proscar cytadren, decadron, solucortef and cortex are some of the endocrine disorder drug.

Fertility drugs are those medications that are used for the treatment of ovulation disorders. These drugs are meant for those women who face difficulties in conceiving naturally. A variety of fertility drugs function by causing the ovaries of woman to release mature eggs every month. When matured egg is fertilized with the help of sperm then it takes a form of a baby. These medications can be taken either orally or injected into the body. The most familiar fertility drugs are clomiphene, serophene, bromocriptine and human menopausal gonadotrophin.

A class of medicines that are prescribed by the doctor to those who are suffering from stomach infections, nausea, vomiting, ulcers, tumors, intestinal obstruction, digestion or bowel related ailments are referred to as gastrointestinal drugs. Antacids, laxatives, opioids, antispasmodics, proton pump inhibitors, reflux suppressants, antidiarrhoeals, or bile acid sequestrants are some of the known gastrointestinal drugs.

The main function of genito urinary drug is to treat and cure different type of diseases like urogenital cancers, benign prostatic hyperplasia, prostatitis, erectile dysfunction and premature ejaculation. Treatment of these ailments can be done by taking different types of genito urinary drugs such as doxazosin, mitoxantrone, diuretic, antiandrogens, corticosteroids, estramustine, antispasmodic and other urogenital drugs.

Medicines or steroids that are used in the treatment of human immuno deficiency virus and acquired immuno deficiency related syndromes are often termed as HIV drugs. Currently, the HIV drug market is full of countless number of effective medications like zidovudine, lamivudine, abacavir, zalcitabine, didanosine, stavudine, delavirdine, nevirapine, indinavir, and ritonavir. These medicines prevent the virus from spreading further and assist people to live a longer and prosperous life.

Hypertensive drugs are used for bringing down the blood pressure to the normal level quickly. A variety of hypertensive drugs are used, either alone or in combination with other drugs for treating symptoms of high blood pressure. The commonly used hypertensive drugs are diuretic, angiostensin converting enzyme inhibitor, beta-blocker, calcium blocker, direct vasodilators and angiotensin receptor blockers.

The metabolism system is considered to be the engine of human body, which performs almost all the activities like generating new cells and tissues, maintaining correct body temperature, repairing damaged tissues, removing toxins and healing injuries. Those who are suffering from any of the metabolic conditions need to take different types of metabolic drugs. Anti platelet, anti inflammatory, anti hypertensive, cholesterol and blood glucose medications are the primary metabolic drugs sold in the market.

Musculoskeletal system drug is a general term used for those medications that are specifically produced for the treatment of muscle, bones, joints, ligaments, tendons and skeleton related diseases. A number of diseases like arthritis, bursitis muscular dystrophy, tendinitis, rheumatic problems, and other disorders of ankle, arm, foot, hand or knee can very well be treated with musculoskeletal system drugs like muscle relaxant, glucosamine, anti inflammatories, antigout etc.

Ophthalmic drugs are a class of medications that are essential for treating eye-related maladies. These medicines are put inside the eye or applied under the eyelid for treating any type of infections. Drugs used for treating eye disorders are available in form of tablets, pills, powder and liquid. Inflammation, cataract, dry eye, neurodegeneration and glaucoma are some of the eye diseases that can be treated and cured by ophthalmic drugs.

These drugs are mainly used to relieve and ease pain. Pain relief drugs include broad variety of drugs such as paracetamol, non steroidal anti-inflammatory drugs, narcotic drugs, tricycle anti depressants, anti convulsants etc. Globally, the pain relief drugs market accounts for $ 30.9 billion that is expected to reach to $ 40.6 billion in 2012.

Respiratory drugs consist of both over the counter and prescription medications that are taken to treat and cure bronchial, asthma, cystic fibrosis, chronic obstructive pulmonary or other respiratory related disorders. Expectorants, decongestants, bronchodilators, antitussives, and antihistamines are the category of respiratory drugs that are most likely to be prescribed by your doctor.

Are those medications or drugs that are crucial for treating, curing and preventing skin ailments. Skin medicines are sold in market in the form of capsule, pill, tablet, injection, or cream. Diseases that can be treated with the help of these drugs are dermatitis, eczema, warts, ulcers, dandruff, psoriasis, rosacea, acne, pimples, boils, itching, leukoderma, sores, rashes and several other skin problems.

Consists of medicines, which are used to temporarily lower the sensation, usually so that painful procedures or surgery can be performed easily. Generally, there are two types of surgical drugs: one which is used to make the patient unconscious and other one is to numb any part of the body that would otherwise sense pain. The size of surgical drug market was $ 96 billion in the year 2006, accounting for annual growth rate of 7.4%.

Vaccine is basically an antigenic preparation that vitalizes the production of antibodies with the main aim of strengthening immunity system and protecting human body against a particular disease or infection. Vaccines are usually of six types namely live whole virus, killed whole virus, recombinant, anti idiotype, subunit and DNA vaccines. Once these vaccines are taken into the body then the immune system becomes active and fights with foreign agents and kills them completely.