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The complex interaction between food, nutrients and drugs, make it difficult to accurately determine the exact effects of these relationships in the body. A drug is defined as a substance used in the diagnosis, treatment or prevention of a disease, or component of a medication.

There are many dramatic results and problems that may be caused by food-drug, drug-drug, and alcohol-food-drug interactions, and these vary from person to person.

Drug-nutrient interactions involve changes to a drug caused by a nutrient, or changes to a nutrient as a result of the drug.

Food-drug interactions is a broader term that describes the effects of a drug on nutritional status. Each of these interactions may lead to many complications.

Food or nutrients in the stomach or intestine may act to reduce the absorption of a drug by delaying digestion, binding to minerals found in the food, or adhering to food particles. In other cases, the food may promote drug absorption.

Food may act to enhance or inhibit the metabolism of certain drugs in the body. Food and nutrients may act to alter the reabsorption and excretion of drugs from the kidney. Certain food components can lead to the enhancement or opposition of the effects of some drugs. Some examples of food and constituents found in food include: vitamins, minerals, fat, proteins, caffeine, or alcohol.

Regarding food-drug interactions physicians and pharmacists recognize that some foods and drugs, when taken simultaneously, can alter the body's ability to utilize a particular food or drug, or cause serious side effects. Clinically significant drug interactions, which pose potential harm to the patient, may result from changes in pharmaceutical, pharmacokinetic, or pharmacodynamic properties. Some may be taken advantage of, to the benefit of patients, but more commonly drug interactions result in adverse drug events. Medicines can treat and cure many health problems. However, they must be taken properly to ensure that they are safe and effective.

For example, most of ED-drugs interact with fatty food, which slows down their effect, but there are some medications like Kamagra Soft tablet. The advantage of Kamagra Soft is momentary effect, less side effects and nice flavor. The unique formula of this drug allows taking it along with fatty food or alcohol.Take ED drugs pills in 15-20 minutes before sexual activity.

The study of drug-drug, food-drug, and herb-drug interactions and of genetic factors affecting pharmacokinetics and pharmacodynamics is expected to improve drug safety and will enable individualized drug therapy. Drugs can show their efficacy only if administered in appropriate quantity with appropriate combination of drugs and foods and at appropriate time.