It is known to all that people must be rather careful to maintain a kind of healthy diet when they take medicines. The improper diet can decrease the drug effect or even fight against these drugs to cause serious results. 

Vitamin E and gingko can affect the drug effect of anticoagulant. Vitamin E plays an important role in resisting aging and beautifying the skin for people. However, vitamin E can not be taken with aspirin together, or the risk of bleeding can be increased. Gingko can effectively resist the coagulation of blood. Therefore, the simultaneous use of gingko and anticoagulant can cause gum bleeding, melena, hematuria and so on. In addition, the simultaneous use of gingko and pain-killer can even cause cerebral hemorrhage.

can decrease the normal effect of anti-ulcer agents. People with ulcer usually take the medicines containing calcium and magnesium to alleviate the symptoms. If people supplement vitamin D at the same time, hypercalcemia or hypermagnesemia can be caused.

The patients with the heart disease usually take cardiotonic drugs to support the normal physical activities. They should remember that they can not eat health care products like calcium and vitamin D together with the cardiotonic drugs, or the digitalism can be easily caused. If people need to supplement calcium to deal with osteoporosis, they can absorb calcium from the dietary therapy. For example, the intake of milk and bean products can be increased. Erythrocin can be integrated with calcium to defer and decrease the absorption of the medicine. can be integrated with calcium to cause sedimentation, which can not only resist the calcium supplementation, but also reduce the drug effect.

The intake of protein should be strictly controlled if people get hypersensitivity diseases like rhinitis and eczema. The excessive intake of protein can produce a lot of histamine which can affect the normal effect of the drugs which are used to alleviate the symptoms of hypersensitivity diseases.

Garlic and ginger can decrease the effect of cold remedy. Some people think that garlic and ginger can remove the toxins from the human body and resist the harms of viruses. The intake of these foods can strengthen the effect of drugs. However, these foods can oppositely decrease the drug effect. The medicines for colds can induce mild diaphoresis and relieve exterior syndrome. The nature of the foods including garlic and ginger is opposite to the effects of the medicines. As a result, the drug effect can be seriously affected.