Can I drink water before physical examination?

You can drink water before physical examination.

If you are really thirsty, you can drink less boiled water, and remember not to drink more, and control it within 200 ml. Drinking too much water will dilute the blood and affect the blood test.

Extended data

Before the physical examination, some drugs should be stopped.

1 antipyretic

Taking non-steroidal anti-inflammatory drugs such as acetaminophen and ibuprofen before physical examination may lead to an increase in transaminase during liver function examination, which may be misjudged as a liver problem. Therefore, it is best for everyone to stop using this medicine and stop using the compound cold medicine containing the above ingredients according to the doctor's advice the day before the physical examination.

2, vitamins

Some people take vitamin C for a long time in order to supplement vitamins in the body, but vitamin C is a strong reducing agent, which can react chemically with reagents for detecting blood sugar and urine sugar, so that the detected blood sugar and urine sugar content is low.

It is suggested that people who take vitamin C daily should stop taking it 2 ~ 3 days before routine urine examination. People who take B vitamins can see yellow urine during urine test, which will affect the judgment of urine color, and it is also recommended to stop using it.

3. Antibacterials

Ofloxacin antibiotics, such as norfloxacin and levofloxacin, are clinically used for enteritis, pneumonia and other diseases caused by specific bacterial infections, but they may form crystals in urine, which may affect some indicators of routine urine examination.

In addition, antibiotics such as sulfonamides and penicillin increase the concentration of uric acid in blood. After taking sulfonamides, the urinary bile source will be turbid, which will affect the judgment of the results. Therefore, it is necessary to consult the doctor before the physical examination.

4. Contraceptive pills

If you take contraceptives containing estrogen every day, thrombocytopenia may occur during routine blood tests. This is because birth control pills containing estrogen will affect coagulation, leading to thrombocytopenia and increased blood viscosity. It may also cause mild hypertension. If you take/kloc-0 once a week, it will generally have little effect. Everyone should explain to the doctor before the physical examination.

5. Anticoagulant

Patients with cardiovascular and cerebrovascular diseases often need to take anticoagulant drugs such as clopidogrel to reduce the risk of myocardial infarction and stroke, but physical examination after taking the drug may cause changes in coagulation time. Before doing routine blood tests and coagulation tests, try to inform the doctor, and then take blood tests 8 hours after taking the medicine.

It should also be reminded that although diuretics in antihypertensive drugs, such as hydrochlorothiazide, furosemide, itaconic acid, etc. It can significantly reduce the content of potassium ions in blood. Because it has the function of retaining sodium and expelling potassium from the kidney, they have certain influence on the detection results of blood electrolytes, especially potassium and sodium.

However, for patients with chronic diseases such as hypertension, antihypertensive drugs should not be stopped at will. Some patients with blood and urine retention after physical examination can take supplements according to the doctor's advice. If you have strict requirements to take it at a certain time, you need to tell the medical examiner your medication history truthfully, and the doctor will comprehensively evaluate the results according to your medication situation.

References:

People's Network-Physical Examination Common Sense What should I pay attention to when going to the hospital for physical examination