Who shouldn't use aspirin
 For the old, using aspirin everyday doubles the risk of lacking blood for myocardium. Children, asthma patients, stomach ulcers patients, etc. shouldn't use this medicine.
Active element of aspirin exists in ingredients of many normal mixtures of medicines. Besides the effect of reducing pain, resisting inflammation, for more than 20 recent years, people have also found out some new effects of aspirin such as: resists having a stroke due to a block of a blood vessel in the brain, treats heart attack and coronary thrombosis as well as other cardiovascular complications of diabetics.
The reason why aspirin has the effect of treating cardiovascular diseases is that it resists the formation of blood clots. This function enables aspirin to make blood more diluted. A research in America shows that this medicine reduces the rate of slight heart attacks among people who have a little risk of catching cardiovascular diseases. But rate of death of research group and control group are completely the same. Scientists argue that assuming that the effect of preventing heart attack of aspirin is true, this medicine increases a rate of death due to other diseases or complications.
Many researches show that aspirin protects brain cells, decreases having loss of memory of the old and decreases cerebrovascular accident. But some other researches show opposite results: increases cerebrovascular accident, makes brain bleed, hurts brain cells, causes epilepsy, degenerates macula lutea of eyes. A research in late 2005 in Japan affirmed that aspirin not only couldn't prevent cerebrovascular accident of irregular heartbeat patients but also made them bleed.
Harmful effects of aspirin
One of the popular complications of aspirin is hurting digestive system, causing stomach ulcers, causing digestive system to bleed. About 2 - 6% of users have to stop using this medicine because of these manifestations. The more the dose is and the older users are, the more abilities to have complications in digestive system. The effect of resisting blood clots of aspirin also increases the risk of haemorrhage of the brain, the rate is 2% of users.
For the old, using aspirin so frequently doubles the risk of having anaemic myocardium. Aspirin also increases haemorrhage cases, kidney cancer and large intestine cancer, it has no effect of preventing heart attack for hypotensives as well as hypotensives.
People who are at risk of having low coronary artery not only haven't got any effect but also are more likely to have complications caused by this medicine.
Some people are also allergic to aspirin, it causes itches, hives, oedema on eyes, etc. Aspirin also causes a type of asthma called asthma caused by aspirin. Bronchial asthma patients with polyp in nasal cavity mustn't use aspirin because it can cause serious attacks of asthma.
For children, aspirin also causes Reye syndrome that rarely happens but it is very dangerous. This syndrome often happens when children patient use aspirin to treat flu, chickenpox or other disease caused respiratory system viruses. The first manifestations are regurgitation, sleepiness and unconsciousness, respiratory palsy. Patients can have degenerative liver and die of brain oedema in serious cases.
American scientists show that aspirin also increases the rate of miscarriage when it is used in pregnant period, especially in the early period.
How to use it?
According to the results of researches and the present knowledge, aspirin should only be used with its normal indication to cure diseases and symptoms when necessary. Absolutely not use for people who have prehistory of hemorrhage and stomach ulcers, people who are sensitive to aspirin as well as people who have liver and kidney disease.
Many forms of aspirin which are covered in films or neuter aspirin don't actually decrease the rate of complications in digestive system. Drinking wine with any amount increases the risk of causing bleeding of aspirin.
On using with other resisting inflammation and reducing pain medicines like ibuprofen, harmful effects on digestive system of aspirin will be doubled. Its ability to cause bleeding also increases when it is used with resisting blood clots.
A worry is that: for many patients, manifestations of bleeding are often latent and have no foretold sign. The following symptoms can make us have to be cautious: black faeces, emptying the bowels with blood, vomiting blood, formidable stomachache due to acute bleeding and lacking blood due to latent bleeding for a long time.
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