Over The Counter Allergy Medicine: Side Effects and Warning

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Over the counter allergy medicine can be bought without a prescription. Actually, the drug is safe, but the drugs used without a doctor’s recommendation be dangerous for you. Prescription drugs require a prescription because it can cause addiction, poisoning, overdose, and so forth.

Side Effects of Allergy Medicine

OTC drugs are widely used allergy medications, vitamins, food supplements, and drugs for flu. Diphenhydramine usage in large doses can lead to elongation of impulse conduction and cardiac muscle spasms. The use loratadine and chlorpheniramine in combination flu drug can cause heart artemia and QT prolongation syndrome. Side effects that occur in the gastrointestinal tract are not related to ethanolamine in drugs such as bromo diphenhydramine, doxylamine, and diphenhydramine. This substance does not have a strong anthropic activity but can cause drowsiness in patients. Antihistamines are drugs to treat various types of allergies. These drugs also have side effects. Antihistamines can cure allergies such as sneezing, rashes, watery eyes, itching, and nasal congestion. These drugs are usually sold in capsules and tablets. Antihistamines are also sold in the form of a nasal spray. Side effects are typically experienced by patients are irritability, dry mouth, visual disturbances, increased stomach acid, headache, and drowsiness. These side effects will disappear when the body is adapting to antihistamines. If you experience other side effects such as difficulty breathing, difficulty urinating, shortness of breath and palpitations, then you should immediately go to the doctor.

How Antihistamines Work

Antihistamines work by blocking the release of histamine in the body. Histamine is released when the body reacts to allergens such as animal dander, mold, and dust. Histamine released by glands in the body can cause eye and swollen nose. The gland will secrete mucus to prevent allergens enter the body. The side effects of histamine are more disturbing than the allergen. Allergic responses can be reduced by limiting the body’s ability to release histamine. There are some patients who should get a doctor’s supervision when taking antihistamines. Patients who have an overactive thyroid, epilepsy, seizure disorders, heart disease, high blood pressure, bladder problems, stomach ulcers, and glaucoma. If patients are nursing or pregnant, the patient should consult a doctor.


There are certain medications that can react with antihistamines. If the patient was taking painkillers, drug seizures, depression medications, tranquilizers, and sleeping pills, then the patient should consult a doctor before taking antihistamines. These drugs can cure allergies when consumed in accordance with the rules of the doctor. Do not take medication with excessive doses because of the side effects of this drug will harm your health. Those are some things to consider when taking over the counter allergy medicine.

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