Before starting or resuming the use of Siluet®, film-coated tablets, it is necessary to collect an anamnesis (including a family history), and pregnancy should be excluded. It is necessary to measure blood pressure and conduct a general examination taking into account contraindications and warnings. It is necessary to explain to the woman the need to carefully read the instructions for the use of Siluet® and follow the recommendations set forth therein. The nature of medical examinations involving at a general medical and gynecological examination, is determined by the treating physician-gynecologist individually for each woman and is conducted at a different frequency, but at least once every 6 months. A woman should be warned that oral contraceptives do not protect against HIV infection (AIDS) or any other sexually transmitted disease.
Reduced efficiency
Reduction of the effectiveness of the combination of EE and DG occurs in the case, for example, of missed admission, with gastrointestinal disorders or with the concomitant therapy.
Changing the nature of bleeding
The use of Siluet®, especially in the first three cycles, may be accompanied by the appearance of acyclic bleeding / bleeding from the vagina, which can be considered as a period of adaptation.
If irregular bleeding is present continuously or appear after previous normal regular cycles, nonhormonal causes of these phenomena should be considered and the malignant neoplasms and pregnancy should be excluded. In this case, you need to see a gynecologist.
In some women, bleeding "cancellation" may not occur during a break between doses of the drug. If a woman took Siluet® as directed, pregnancy is unlikely. However, if a woman has been admitted to receive a drug before the first "bleeding" bleed, or if there are two passes, pregnancy should be excluded before continuing with Silute®.Herbal medicines containing St. John's wort (Hypericum perforatum), should not be used in parallel with Siluet® because of their ability to reduce the plasma level of the drug and reduce the effectiveness of the combination of DNG and EE.
The use of combined oral contraceptives leads to an increased risk of venous thromboembolism (VTE). The risk of VTE is the highest in the first year of combined oral contraceptive use. The risk of VTE associated with taking a combination of DNG and EE is less than the risk associated with pregnancy, it is 60 cases per 100,000 pregnancies. VTE ends with a lethal outcome in 1-2% of cases.
Symptoms of arterial or venous thrombotic or thromboembolic complications may include:
- Unusual unilateral leg pain and / or swelling;
- Sudden severe pain in the chest with possible irradiation in the left arm;
- Sudden shortness of breath;
- A sudden fit of coughing;
- Any unusual, severe prolonged headache;
- Sudden partial or complete loss of vision;
- Diplopia;
- Slurred speech or aphasia;
- Dizziness;
- Fainting condition, accompanied by a partial epileptic fit or without it;
- Sudden weakness or significant numbness on one side or in one part of the body;
- Movement disorders;
- "Acute abdomen."
The risk of venous thromboembolic complications increases:
- With age;
- In the presence of a family history (venous thromboembolism, ever occurred in close relatives and parents at a relatively young age); if a congenital predisposition is possible, the woman should be referred to a specialized specialist to decide whether to prescribe Siluet®;
- For prolonged immobilization, after serious surgical intervention, any surgical intervention on the legs or after a serious injury. In these cases, it is preferable to stop taking the tablets (with scheduled operations for at least four weeks) and not resume until two full weeks after remobilization. If the drug has not been canceled in advance, antithrombotic therapy should be prescribed;
- With obesity (body mass index more than 30 kg / m2).
There is no consensus on the role of varicose veins or thrombophlebitis of superficial veins in the onset and development of venous thrombosis.
The risk of arterial thromboembolic complications or the risk of stroke in women using a combination of DNG and EE is increased:
- With age;
- In the presence of dyslipoproteinemia;
- In the presence of arterial hypertension;
- In diseases of the heart valves;
- With atrial fibrillation;
- When smoking: smoking increases the risk of severe cardiovascular complications (such as myocardial infarction, stroke); the risk rises with age and the number of cigarettes smoked.
The presence of one severe or several risk factors for the development of venous or arterial diseases, respectively, may also be a contraindication. To consider also it is necessary to accept the possibility of using anticoagulant therapy. It should be noted that women who receive Siluet® receive the need to contact a doctor if they suspect a history of thrombosis. In the case of suspected or proven thrombosis, the drug should be discontinued. In this case, women need to use other suitable methods of contraception due to the teratogenic effect of anticoagulant drugs (coumarins).
It is necessary to take into account the increased risk of thromboembolism in the postpartum period.
Other conditions associated with adverse adverse vascular reactions include diabetes mellitus, systemic lupus erythematosus, hemolytic-uremic syndrome, and chronic inflammatory bowel disease (Crohn's disease or ulcerative colitis).
An increase in the frequency and severity of migraine when taking a combination of DGT and EE (which may be a harbinger of cerebral circulatory disorders) may be an indication for immediate withdrawal of the drug. Tumors
Some epidemiological studies have reported an increased risk of developing cervical cancer with prolonged use of a combination of DGN and EE (more than 5 years). However, there are still contradictions as to the extent to which these cases are related to the characteristics of sexual behavior and other factors, for example, the human papillomavirus (HPV).
The studies show a slight increase in relative risk (RR = 1.24) of breast cancer in women who used combined oral contraceptives.The increased risk gradually decreases within 10 years after the withdrawal of these drugs.
In rare cases, against the background of the combination of DNG and EE, the development of benign liver tumors, in even more rare cases, malignant tumors. In some cases, these tumors led to life-threatening intra-abdominal bleeding. When severe pain occurs in the upper abdominal region, liver enlargement and signs of intraperitoneal bleeding in women taking combinations of DG and EE, liver tumors should be excluded.
Other states
Women with hypertriglyceridemia, at the present time or in the anamnesis, have an increased risk of developing pancreatitis when using a combination of DGN and EE. Although a small increase in blood pressure (BP) has been reported in many women taking combinations of DMS and EE, clinically significant increases have been rare. Nevertheless, if during the administration of CPC by women with arterial hypertension (AH) there is a stable increase in blood pressure, or sudden increases in blood pressure do not respond to antihypertensive therapy, the drug should be withdrawn. If possible, admission can be continued if normal blood pressure values are achieved with the help of antihypertensive therapy.
Acute or chronic liver disease may require discontinuation of Siluet® until the liver function returns to normal. Recurrent cholestatic jaundice, which develops for the first time during pregnancy or previous reception of sex hormones, requires discontinuation of the combination of DNG and EE.
Although a combination of DNG and EE can affect insulin resistance and glucose tolerance, there is usually no need to adjust the treatment regimen in diabetic patients. However, women with diabetes should be carefully monitored by the doctor while taking Siluet®.
Against the background of the combination of DNG and EE, the course of Crohn's disease and ulcerative colitis may worsen.
Periodically, chloasma may appear, especially in women with a history of chloasma. Women with a tendency to chloasma should avoid prolonged exposure to the sun and exposure to ultraviolet radiation during the administration of Siluet®.
Laboratory research
The use of contraceptive steroids can affect the results of some laboratory studies, including biochemical indicators of liver function,thyroid gland, adrenal gland and kidneys, as well as the plasma levels of transport proteins, for example, corticosteroid-binding globulin and lipid / lipoprotein fractions, the parameters of carbohydrate metabolism, as well as coagulation and fibrinolysis. Changes usually remain within the normal range.