Due to psychological desire to regain physique, many people have come to medicine and fast weight loss methods without finding out the mechanism of action.
Meanwhile, the mechanism of action is a very important criterion to evaluate the effectiveness and safety of drugs. The fast weight loss drugs are currently divided into the following groups:
Group of fast weight loss drugs causing dehydration (diuretics, laxatives):
This is a quick way to lose weight from reducing the total amount of water (which accounts for 60-70% of body weight) through the urinary tract. Water accounts for 70% of body weight so when dehydration will cause weight loss quickly. However, rapid weight loss in this way causes thirst, dryness of the neck, fatigue, dizziness, headache, exhaustion. Causes bad skin, dryness, sagging due to too fast reduction, the skin has not recovered yet.
Dehydration leads to electrolyte disturbances that excrete the excretory system to impair kidney function, toxins that cannot be eliminated, reduce peristalsis, easily cause uncontrolled urination. Losing lots of water will cause vasomotor disorders affecting blood pressure, cardiovascular, and neurological. If the body loses 20% of the total amount of water leading to the risk of death.
Rapid weight loss group by inhibiting central nervous system:
These drugs give the user a feeling of loss of appetite, appetite is boring, so there is no need to receive nutrition, thereby reducing weight after a few days of eating less than usual. This fast weight loss drug stimulates sympathetic strength, induces dyspepsia … so users often experience side effects such as dry mouth, headache, insomnia, hypertension, rapid heartbeat, constipation or diarrhea, reduce absorption of fat-soluble vitamins …
Due to reduced appetite, minimizing the intake of energy, causing malnutrition, anemia, metabolic disorders leading to fatigue, headache … and directly affect the activities of the body.
Drugs that fill the digestive tract:
These drugs are filled with fillers, filling the gastrointestinal tract, so it makes sense that even though you eat less food than usual, your body still feels full and doesn’t want to eat more, thus losing weight quickly.
Side effects of the medicine are bloating, flatulence. If used for a long time, the body will gradually become malnourished, depleted, and difficult to concentrate on work and affect daily life. Bad skin caused by not being provided with enough nutrients and water should be pale, loss of vitality, loss of youthfulness and a rosy, smooth appearance.
The group restricts fat absorption:
This medicine quickly loses weight due to its effect on preventing the intake of fat. Unabsorbed oil and fat will follow the stool. This is also the main cause of side effects such as bowel movement fecal fat, flatulence, or being flat and glutinous, gastrointestinal disorders caused by disorders of fat absorption.
Because it reduces the absorption of long-term fat intake, it will reduce the synthesis of fat-soluble vitamins such as A, D, K, E of the body.