Description
Release form
Packing
21 pcs.
Pharmacological action
Lindinet is a combined drug whose action is due to the effects of the components that make up its composition. It inhibits the pituitary secretion of gonadotropic hormones. The contraceptive effect of the drug is associated with several mechanisms. The estrogenic component of the drug is a highly effective oral drug – ethinyl estradiol (a synthetic analogue of estradiol, involved with the corpus luteum hormone in the regulation of the menstrual cycle).
The progestational component is a 19-nortestosterone derivative – gestodene, superior in strength and selectivity to not only the natural corpus luteum hormone progesterone, but also modern synthetic progestogens (levonorgestrel). Due to its high activity, gestodene is used in very low dosages, in which it does not exhibit androgenic properties and practically does not affect lipid and carbohydrate metabolism.
Along with the indicated central and peripheral mechanisms that prevent the fertilization of an egg capable of fertilization, the contraceptive effect is due to a decrease in the sensitivity of the endometrium to the blastocyst, as well as an increase in the viscosity of the mucus located in the cervix, which makes it relatively impassable for spermatozoa. In addition to the contraceptive effect, the drug, when taken regularly, also has a therapeutic effect, normalizing the menstrual cycle and helping to prevent the development of a number of gynecological diseases, including tumor nature.
Pharmacokinetics
Gestoden
Absorption. When taken orally, it is rapidly and completely absorbed. After taking a single dose, plasma Cmax is measured after an hour and is 2 4 ng / ml. Bioavailability is about 99%.
distribution. It is associated with albumin and sex hormone binding globulin (SHBG). 1 2% are in a free state, 50 75% are specifically associated with SHBG. An increase in SHBG levels due to ethinyl estradiol affects the level of gestodene, leading to an increase in the SHBG-related fraction and a decrease in the albumin-bound fraction. Vd of gestodene – 0.7 1.4 l / kg.
Metabolism. Corresponds to the metabolism of steroids. The average plasma clearance is 0.8 1 ml / min / kg.
Withdrawal. Blood levels are reduced in two stages. The half-life in the final phase is 12 20 hours. It is excreted exclusively in the form of metabolites – 60% with urine, 40% with feces. T1 / 2 metabolites – approximately 1 day.
Stable concentration. The pharmacokinetics of gestodene is largely dependent on the level of SHBG. Under the influence of ethinyl estradiol, the concentration of SHBG in the blood increases 3 times with daily use of the drug, the level of gestoden in the plasma increases 3-4 times and reaches a saturation state in the second half of the cycle.
Ethinyl estradiol
Suction. When taken orally, it is absorbed quickly and almost completely. Cmax in the blood is measured after 1 2 hours and is 30 80 pg / ml. Absolute bioavailability 60% (due to presystemic conjugation and primary metabolism in the liver).
distribution. It easily enters into a non-specific relationship with blood albumin (about 98.5%) and causes an increase in SHBG levels. The average Vd is 5 18 l / kg.
Metabolism. It is carried out mainly due to aromatic hydroxylation with the formation of large quantities of hydroxylated and methylated metabolites, which are partly in free, partly in conjugated form (glucuronides and sulfates). Plasma clearance »5 13 ml / min / kg.
Withdrawal. The concentration in serum is reduced in 2 stages. T1 / 2 in the second phase »16-24 hours. It is excreted exclusively in the form of metabolites in a ratio of 2: 3 with urine and bile. T1 / 2 metabolites »1 day.
Stable concentration. Set by the 3-4th day, while the level of ethinyl estradiol is 20% higher than after taking a single dose.
Indications
Contraception.
Special instructions
Before starting the use of the drug, it is recommended to collect a detailed family and personal history and then undergo a general medical and gynecological examination every 6 months (examination by a gynecologist, examination of a cytological smear, examination of the mammary glands and liver function, blood pressure monitoring, blood cholesterol concentration, Analysis of urine). These studies should be repeated periodically due to the need for timely identification of risk factors or contraindications that have arisen.
The drug is a reliable contraceptive – the Perl index (an indicator of the number of pregnancies that occurred during the use of the contraceptive method in 100 women within 1 year) when used correctly is about 0.05. Due to the fact that the contraceptive effect of the drug from the beginning of taking is fully manifested by the 14th day, it is recommended that non-hormonal methods of contraception be additionally used in the first 2 weeks of taking the drug.
In each case, before the appointment of hormonal contraceptives, the benefits or possible negative effects of their administration are individually evaluated. This issue needs to be discussed with the patient, which, after receiving the necessary information, will make the final decision on the preference for hormonal or any other method of contraception. The health status of a woman must be carefully monitored.
If any of the following conditions / diseases appears or worsens while taking the drug, you must stop taking the drug and switch to another non-hormonal method of contraception:
– diseases of the hemostatic system
– conditions / diseases that predispose to the development of cardiovascular, renal
insufficiency –
epilepsy –
migraine – risk of developing an estrogen-dependent tumor or estrogen-dependent gynecological diseases
– diabetes mellitus not complicated by vascular disorders of srd lkp – severe depression (if depression is associated with impaired tryptophan metabolism, then for the purpose of correction, you can use vitamin B6)
– sickle cell anemia, because in some cases (for example, infections, hypoxia), estrogen-containing drugs with this pathology can provoke
thromboembolism – the appearance of deviations in laboratory tests evaluating liver function.
Thromboembolic diseases
Epidemiological studies have shown that there is a correlation between taking oral hormonal contraceptives and an increased risk of arterial and venous thromboembolic diseases (including myocardial infarction, stroke, deep vein thrombosis of the lower extremities, thromboembolism). An increased risk of venous thromboembolic diseases has been proven, but it is significantly less than during pregnancy (60 cases per 100 thousand pregnancies). When using oral contraceptives, arterial or venous thromboembolism of the liver, mesenteric, renal vessels or retinal vessels is very rarely observed.
The risk of arterial or venous thromboembolic diseases is increased:
– with age
– with smoking (heavy smoking and over the age of 35 years are risk factors)
– if there is a family history of thromboembolic diseases (for example, parents, brother or sister). If a genetic predisposition is suspected, it is necessary to consult a
specialist before using the drug – for obesity (body mass index above 30)
– for dyslipoproteinemia
– for arterial hypertension
– for heart valve diseases, complicated by hemodynamic disturbances
– with atrial fibrillation
– with diabetes mellitus complicated by vascular lesions
– with prolonged immobilization, after major surgery, surgical intervention on the lower extremities, severe trauma.
In these cases, a temporary discontinuation of the drug is expected. It is advisable to stop no later than 4 weeks before surgery, and resume no earlier than 2 weeks after remobilization.
Increased risk of venous thromboembolic disease in women after childbirth.
Diseases such as diabetes mellitus, SLE, hemolytic uremic syndrome, Crohn’s disease, ulcerative colitis, sickle cell anemia, increase the risk of venous thromboembolic diseases.
Biochemical abnormalities such as resistance to activated protein C, hyperhomocysteinemia, protein C, S deficiency, antithrombin III deficiency, the presence of antiphospholipid antibodies, increase the risk of arterial or venous thromboembolic diseases.
When assessing the benefit / risk ratio of taking the drug, it should be borne in mind that targeted treatment of this condition reduces the risk of thromboembolism.
Signs of thromboembolism are:
– sudden chest pain that radiates to the left arm
– sudden shortness of breath
– any unusually severe headache that lasts a long time or appears for the first time, especially when combined with a sudden complete or partial loss of vision or diplopia, aphasia, dizziness, collapse, focal epilepsy, weakness or severe numbness of half the body, motor disorders, severe unilateral pain in the calf muscle, acute abdomen.
Tumor diseases
Some studies have reported an increase in cervical cancer in women who have been taking hormonal contraceptives for a long time, but the results are contradictory. In the development of cervical cancer, sexual behavior, infection with the human papillomavirus and other factors play a significant role.
A meta-analysis of 54 epidemiological studies showed that there is a relative increase in the risk of breast cancer among women taking oral hormonal contraceptives, but a higher detection of breast cancer could be associated with a more regular medical examination. Breast cancer is rare among women under the age of 40, regardless of whether they take hormonal contraceptives or not, and increases with age. Taking pills can be regarded as one of many risk factors. However, a woman should be made aware of the possible risk of developing breast cancer, based on an assessment of the ratio of benefits and risk (protection against cancer of the ovary, endometrium and large intestine).
There are few reports of the development of a benign or malignant tumor of the liver in women who have been taking hormonal contraceptives for a long time. This should be borne in mind in the differential diagnostic assessment of abdominal pain, which may be associated with an increase in liver size or intra-abdominal bleeding.
A woman should be warned that the drug does not protect against HIV infection (AIDS) and other sexually transmitted diseases.
The effectiveness of the drug may decrease in the following cases: missed tablets, vomiting and diarrhea, the simultaneous use of other drugs that reduce the effectiveness of birth control pills.
If the patient is simultaneously taking another drug that may reduce the effectiveness of birth control pills, additional methods of contraception should be used.
The effectiveness of the drug may decrease if, after several months of their use, irregular, spotting or breakthrough bleeding appears, in such cases it is advisable to continue taking the tablets until they are finished in the next package. If at the end of the 2nd cycle, menstrual bleeding does not start or acyclic spotting does not stop, stop taking the pills and resume it only after exclusion of pregnancy.
Chloasma
Chloasma can sometimes occur in women who have had a history of pregnancy. Those women who are at risk for chloasma should avoid contact with sunlight or UV while taking the pill.
Changes in laboratory parameters
Under the influence of oral contraceptive pills – due to the estrogen component – the level of some laboratory parameters may change (functional indicators of the liver, kidneys, adrenal glands, thyroid gland, hemostasis, lipoprotein and transport protein levels).
After acute viral hepatitis should be taken after normalization of liver function (not earlier than 6 months). For diarrhea or intestinal disorders, vomiting, the contraceptive effect may decrease (without stopping the drug, it is necessary to use additional non-hormonal methods of contraception). Smoking women have an increased risk of developing vascular diseases with serious consequences (myocardial infarction, stroke). The risk depends on age (especially women over 35 years old) and the number of cigarettes smoked. During lactation, milk excretion may decrease, in insignificant amounts, the components of the drug are excreted in breast milk.
The effect of the drug on the ability to drive a car and working mechanisms. Studies on the possible effect of the drug Lindinet 20 on the ability to drive a car or other cars have not been conducted.
Composition
1 tablet contains:
active substances:
ethinyl estradiol 20 mcg
gestodene 75 mcg
excipients:
sodium calcium edetate,
magnesium stearate,
silicon colloidal anhydrous,
povidone,
starch, corn starch . 47005, E104, povidone, titanium oxide CI 7791, E171, macrogol 6000 talc, calcium carbonate, sucrose.
Dosage and administration
Inside, without chewing, drinking plenty of water, regardless of food intake.
Take 1 tablet. per day (if possible at the same time of day) for 21 days. Then, after taking a 7-day break in taking the pills, resume oral contraception (i.e. 4 weeks after taking the 1st pill, on the same day of the week). During a 7-day break, uterine bleeding occurs as a result of hormone withdrawal.
First dose: Lindinet 20 should be taken from the 1st to the 5th day of the menstrual cycle.
Transition from combined oral contraceptive to taking Lindinet 20. 1st table. Lindinet 20 is recommended to be taken after taking the last hormone-containing tablet of the previous drug, on the 1st day of withdrawal bleeding.
Switching from progestogen-containing drugs (mini-tablets, injections, implant) to taking Lindinet 20. Switching from mini-tablets can be started any day of the menstrual cycle in the case of an implant – the day after its removal in the case of injections – on the eve of the last injection.
Moreover, in the first 7 days of taking Lindinet 20, an additional method of contraception is necessary.
Taking Lindinet 20 after an abortion in the first trimester of pregnancy. Contraceptive administration can begin immediately after an abortion, and there is no need to use an additional method of contraception.
Taking Lindinet 20 after birth or after an abortion in the second trimester of pregnancy. Contraceptive administration can begin on the 21 28th day after childbirth or abortion in the second trimester of pregnancy. With a later start of contraception, in the first 7 days, it is necessary to apply an additional, barrier method of contraception. When, it is necessary to apply an additional, barrier method of contraception. When, it is necessary to apply an additional, barrier method of contraception. When,when sexual contact took place before contraception, before starting to take the drug, you should exclude the presence of a new pregnancy or wait for the next menstruation.
Missed Pills. If the next scheduled pill was missed, then you should fill in the missed dose as soon as possible. With a delay not exceeding 12 hours, the contraceptive effect of the drug does not decrease, and there is no need for an additional method of contraception. The remaining tablets are taken as usual.
With a delay of more than 12 hours, the contraceptive effect may be reduced. In such cases, you should not make up for the missed dose, taking the drug is continued as usual, however, in the next 7 days, an additional method of contraception is necessary. If at the same time less than 7 tablets remain in the package, Then, tablets are taken from the next package without a break. In such cases, uterine withdrawal bleeding occurs only at the end of the 2nd package while taking tablets from the 2nd package, smearing or breakthrough bleeding is possible.
If, upon completion of taking the tablets from the 2nd package, withdrawal bleeding does not occur, then pregnancy should be excluded before continuing with contraception.
Measures for vomiting and diarrhea. If vomiting occurs in the first 3-4 hours after taking the next pill, the tablet is not completely absorbed. In such cases, proceed in accordance with the instructions described in the item Missed tablets.
If the patient does not wish to deviate from the usual regimen of contraception, missed tablets should be taken from a different package.
Delayed menstruation and accelerate the onset of menstruation. In order to delay menstruation, taking tablets from a new package is started without observing a break. Menstruation can be delayed as desired until all tablets from the 2nd package have run out. With a delay in menstruation, breakthrough or spotting uterine bleeding is possible. You can return to your regular pill regimen after a 7-day break.
With the aim of an earlier onset of menstrual bleeding, you can shorten the 7-day break by the desired number of days. The shorter the break, the more likely the occurrence of breakthrough or spotting bleeding while taking the tablets from the next package (similar to cases with delayed menstruation).
Side effects of
Side effects that require immediate discontinuation of the drug:
– arterial hypertension
– hemolytic-uremic syndrome
– porphyria
– hearing loss due to otosclerosis.
Rarely encountered – arterial and venous thromboembolism (including myocardial infarction, stroke, deep vein thrombosis of the lower extremities, pulmonary embolism) exacerbation of reactive SLE.
Very rare – arterial or venous thromboembolism of the hepatic, mesenteric, renal, retinal arteries and veins of Sydenham chorea (passing after drug withdrawal).
Other side effects, less severe, but more common – the appropriateness of continuing the use of the drug is decided individually after consulting a doctor, based on the benefit / risk ratio.
From the reproductive system: acyclic bleeding / spotting from the vagina, amenorrhea after discontinuation of the drug, a change in the condition of the vaginal mucus, the development of inflammatory processes of the vagina (e.g. candidiasis), a change in libido.
From the mammary glands: tension, pain, enlargement of the mammary glands, galactorrhea.
From the gastrointestinal tract and hepatobiliary system: nausea, vomiting, diarrhea, epigastric pain, Crohn’s disease, ulcerative colitis, hepatitis, liver adenoma, the occurrence or exacerbation of jaundice and / or itching associated with cholestasis, cholelithiasis.
From the skin: nodular / exudative erythema, rash, chloasma, increased hair loss.
From the side of the central nervous system: headache, migraine, mood changes, depressive states.
Metabolic disorders: fluid retention in the body, change (increase) in body weight, increased amounts of triglycerides and sugar in the blood, decreased carbohydrate tolerance.
On the part of the sensory organs: hearing loss, increased sensitivity of the cornea when wearing contact lenses.
Other: allergic reactions.
Drug interaction
The contraceptive effect of oral contraceptives decreases with the use of rifampicin, breakthrough bleeding and menstrual irregularities are more frequent. A similar, but less studied, interaction exists between contraceptives and carbamazepine, primidone, barbiturates, phenylbutazone, phenytoin and, presumably, griseofulvin, ampicillin and tetracyclines. During treatment with the above listed drugs, along with oral contraception, it is recommended to use an additional method of contraception (condom, spermicidal gel). After completing the course of treatment, the use of an additional method of contraception should be continued for 7 days, in the case of rifampicin treatment – for 4 weeks.
Interactions associated with the absorption of the drug
During diarrhea, the absorption of hormones decreases (due to increased intestinal motility). Any drug that shortens the residence time of the hormone in the colon leads to low concentrations of the hormone in the blood.
Interactions associated with the metabolism of the drug
Intestinal wall. Drugs that undergo sulfation in the intestinal wall like ethinyl estradiol (e.g. ascorbic acid), inhibit metabolism and increase the bioavailability of ethinyl estradiol.
Metabolism in the liver. Inducers of microsomal liver enzymes reduce the level of ethinyl estradiol in blood plasma (rifampicin, barbiturates, phenylbutazone, phenytoin, griseofulvin, topiramate, hydantoin, felbamate, rifabutin, oxcarbazepine). Liver enzyme blockers (itraconazole, fluconazole) increase the level of ethinyl estradiol in blood plasma.
Effect on intrahepatic circulation. Some antibiotics (for example, ampicillin, tetracycline), interfering with the intrahepatic circulation of estrogens, reduce the level of ethinyl estradiol in plasma.
Effect on the metabolism of other drugs
By blocking liver enzymes or accelerating conjugation in the liver, mainly by increasing glucuronidation, ethinyl estradiol affects the metabolism of other drugs (e.g. cyclosporine, theophylline), leading to an increase or decrease in their plasma concentrations.
The simultaneous use of St. John’s wort preparations (Hypericum perforatum) with Lindinet 20 tablets (due to a possible reduction in the contraceptive effect of the contraceptive active substances, which may be accompanied by breakthrough bleeding and unwanted pregnancy). St. John’s wort activates liver enzymes after stopping the use of St. John’s wort preparations, the effect of induction of enzymes can persist for the next 2 weeks.
The simultaneous use of ritonavir and a combined contraceptive is accompanied by a decrease in the average AUC of ethinyl estradiol by 41%. During treatment with ritonavir, it is recommended to use a drug with a higher content of ethinyl estradiol or a non-hormonal method of contraception. It may be necessary to adjust the dosage regimen when using hypoglycemic agents, because oral contraceptives can reduce carbohydrate tolerance, increase the need for insulin or oral antidiabetic agents.
Overdose
The use of large contraceptive doses was not accompanied by the development of severe symptoms.
Symptoms: nausea, vomiting, young girls have slight vaginal bleeding.
Treatment: symptomatic, there is no specific antidote.
Storage conditions
Do not store above 25 ° C, out of the reach of children.
Shelf life
3 years.
Terms and conditions otpuska IZ drugstore
prescription
dosage form
tablets
Appointment Appointment
For women of childbearing age, adults prescribed by a doctor, For women
Gedeon Richter Vengriya
