Over-the-counter medicines should be avoided but taken with a doctor's recommendation.
Over-the-counter medicines
Over-the-counter medicines (OTC medicines) are medicines that a person can buy and store without getting a prescription from the doctor. Such drugs are used to prevent various common illnesses like cold, flu, nausea, pain, constipation, etc.
Drug-drug Interactions
OTC medicines can interact with another drug which is termed drug-drug interaction. Such interactions can be grouped as duplication, opposition, or alteration. Duplication occurs when the active ingredients are similar and opposition occurs when the active ingredients have opposite effects. Alterations occur when one drug changes the way the body reacts to the other. Such changes can have devastating effects on the patient. Thus OTC medicines must be taken after consulting with a doctor.
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