Red man syndrome is a commonly observed hypersensitive drug reaction after rapid administration of intravenous Vancomycin. It is characterized by fall in blood pressure, appearance of red rash on face, neck, and upper part of body.

Magnesium strearate is commonly used as a binding agent in the manufacture of tablets and capsules. There is some controversy for its toxicity when used as an additive in foods and drugs. Many people claim that it is a safe compound.

Allergy to food dye is observed in some individuals after consuming foods with red or any other food coloring dye. Symptoms vary depending upon the sensitivity of the individual and the quantity of food consumed.

Anti-histamine is considered to be very safe drug however, it may be potentially harmful as it can interact with some other drugs and increase the risk of developing several problems including hypertension and hyperthyroidism.

Foods that are rich in histamine may cause food intolerance in those individuals who are having low level of diamine oxidase enzyme. During an allergic reaction, histamine may cause itching, burning eyes and swelling.

Antihistamines are useful in relieving the symptoms like itching, rash and hives. Side effects include drowsiness, dry mouth and constipation. Antihistamines are used for the treatment of allergic rhinitis, asthma and atopic dermatitis.

Anaphylaxis allergy is a serious form of allergic reaction involving the whole body. Causes include food and medicine allergy and insect bites. Itching, swelling, rash, low blood pressure, breathing difficulty are common symptoms.

Causes of excessive sneezing can be allergic reaction, cold, viral or bacterial infection and vasomotor rhinitis. Remedies include drinking nettle tea, ginger and lemon grass tea and increase of vitamin C intake in the diet.

Smoke allergy may not be a true form of allergy, but rather an irritation and aggravating factor in an already allergic condition. Symptoms can be burning and watering of eyes, running nose, headache, cough and difficulty in breathing.

Seasonal rhinitis usually affects in spring when there is increase of airborne pollens and spores and the body reacts to these allergens. Symptoms include itching in nose and eyes, sneezing and runny nose and patient feels stuffy nose.

Symptoms of allergies due to medications are skin reactions, fever and muscle pain. Common antibiotics that can trigger allergic reactions are morphine and NSAIDs or non-steroidal drug.

Diagnosis of allergic reaction to food in children is done by suggesting guidelines and knowing the feeding history of the child, medical history, and responses to elimination of certain foods.

Symptoms of fig allergy rash vary depending on the parts of the fig tree or fruit. Medicines used are antihistamines and epinephrine and therapeutics like allergy immunotherapy.

True allergic reactions to morphine are rare and it may occur sometimes due to overactive immune response. Symptoms of morphine allergy can be mild like nasal congestion to serious situations like anaphylactic shock.

Although nuts supply the body with a host of vital elements, they also tend to produce allergic reactions in certain individuals. Symptoms include nasal discharge, headache, abdominal pain and numbness of mouth, lips and tongue.

NSAID or non-steroidal anti-inflammatory drugs are used for relief from pain and swelling in many ailments. Some people are allergic to NSAIDs and develop the symptoms like hives all over body, swelling of face and Itching.

Soap allergic reactions are due to chemicals, fragrances and exotic oils present in soaps. Symptoms include rashes, redness and itching on skin. Laundry detergent allergic reactions are more severe with dry and flaky skin.

Sulfa drug allergy is caused by medicines that contain sulfonamides. There are some medications which have components closely related to sulfonamides and they may also cause allergic reactions to those allergic to sulfa.

Sulfates are present in various products of daily use like, shampoos, soaps and even in food and medicines. Some people are allergic to sulfates and develop symptoms like allergic urticaria, rashes and hives and difficulty in breathing.

Symptoms of shampoo allergy are mainly due to chemicals present in the shampoo. Immediate allergic symptoms are itching and burning of scalp skin. Hair loss is due to dandruff and dry scalp caused due to shampoo allergy.