Drospirenone + Ethinyl estradiol Pharmacology

Drospirenone + Ethinyl estradiol

About Drospirenone + Ethinyl estradiol
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Mechanism of Action of Drospirenone + Ethinyl estradiol
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Pharmacokinets of Drospirenone + Ethinyl estradiol
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Onset of Action for Drospirenone + Ethinyl estradiol
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Duration of Action for Drospirenone + Ethinyl estradiol
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Half Life of Drospirenone + Ethinyl estradiol
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Side Effects of Drospirenone + Ethinyl estradiol
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Contra-indications of Drospirenone + Ethinyl estradiol
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Special Precautions while taking Drospirenone + Ethinyl estradiol
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Pregnancy Related Information
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Old Age Related Information
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Breast Feeding Related Information
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Children Related Information
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Indications for Drospirenone + Ethinyl estradiol
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Interactions for Drospirenone + Ethinyl estradiol
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Typical Dosage for Drospirenone + Ethinyl estradiol
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Schedule of Drospirenone + Ethinyl estradiol
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Storage Requirements for Drospirenone + Ethinyl estradiol
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Effects of Missed Dosage of Drospirenone + Ethinyl estradiol
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Effects of Overdose of Drospirenone + Ethinyl estradiol
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Drospirenone

About Drospirenone
Synthetic progestin,In combined oral contraceptive.
Mechanism of Action of Drospirenone
Drospirenone diffuse freely into target cells in the female reproductive tract, mammary gland, hypothalamus, and the pituitary and bind to the progesterone receptor. Once bound to the receptor, progestins slow the frequency of release of gonadotropin releasing hormone (GnRH) from the hypothalamus and blunt the pre-ovulatory LH surge.
Pharmacokinets of Drospirenone
Absoption: Drospirenone absorbed after oral administration
Distribution: 97% bound to serum protein
Metabolism:Metabolised in the liver
Excretion: Excreted in urine and feces
Onset of Action for Drospirenone
N/A
Duration of Action for Drospirenone
N/A
Half Life of Drospirenone
30 hours
Side Effects of Drospirenone
Upper respiratory infections
1.Abdominal pain
2.Headache and spotting of menstrual blood
3.Back pain
4.Venous thromboembolism
5.Nausea
6.Vomiting
7.Weight gain
Contra-indications of Drospirenone
1.Hyper sensitivity to drug
2.Thrombo embolic disorder
3.Breast cancer
4.Hepatic impairment
Special Precautions while taking Drospirenone
1.May increase risk of breast cancer
2.Thromboembolism and glucose intolerance
3.Renal impairment
4.Hepatic problem
5.Migrain
Pregnancy Related Information
Contraindicated
Old Age Related Information
Use with caution
Breast Feeding Related Information
Contraindicated
Children Related Information
Contraindicated
Indications for Drospirenone
1.Oral contraceptive,
2.Hormone replacement
Interactions for Drospirenone
ACE inhibitors/Angiotensin receptor blockers, Pottasimsparing diuretics: cause hyperkalemiaRifampicin: Reduce efficacy of drug
Typical Dosage for Drospirenone
20 ?g ethinylestradiol and 3 mg drospirenone administered daily for 24 days followed by a 4-day hormone-free interval.
Schedule of Drospirenone
N/A
Storage Requirements for Drospirenone
Store in a well closed container at controlled room temperature bellow 25 degree C in a dry dark place. Keep out of reach of children.
Effects of Missed Dosage of Drospirenone
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Effects of Overdose of Drospirenone
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Ethinyl estradiol

About Ethinyl estradiol
Synthetic Estrogen(a derivative of estradiol), In Combined oral contraceptive,Anti neoplastic.
Mechanism of Action of Ethinyl estradiol
The drug exerts it`s pharmacological action by binding to specific nuclear estrogen receptors present in target cells and regulating protein synthesis and thus producing desired therapeutic effects. Estrogen receptors are found in female sex organs, breast, pituitary, liver, bone, blood vessels, heart, CNS, hormone sensitive breast carcinoma cells, hormone responsive prostate carcinoma cells. Agonist binding to ligand binding domain of these receptors results in receptor dimerization and interaction with "estrogen response elements" of target genes and thus promotes gene transcription; through certain coactivator proteins which ultimately leads to modification of protein synthesis.
It causes growth and development of female sex organs, maintains proper female sexual functioning. It exerts week anabolic action, and also maintains bone mass primarily by preventing bone resorption. It inhibits osteoclast pit formation and increases the expression of bone matrix proteins and also improves lipid profile (rises HDL and lowers LDL levels). It inhibits growth of hormone responsive carcinoma cells in prostate cancer and certain breast cancer.
Pharmacokinets of Ethinyl estradiol
Absorption: Well absorbed orally, but substantially inactivated by liver.
Distribution: Extensively distributed in the body with highest levels in the fatty tissue. About 50% to 80% is plasma protein bound.
Metabolism: Metabolized primarily in liver by glucuronide and sulfate conjugation.
Excretion: Excreted through urine as sulfate or glucuronide conjugates.
Onset of Action for Ethinyl estradiol
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Duration of Action for Ethinyl estradiol
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Half Life of Ethinyl estradiol
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Side Effects of Ethinyl estradiol
1. Urticaria
2. Pruritus
3. Irritations of skin
4. Feminization in males
5. Gynaecomastia(male)
6. Breakthrough bleeding
7. Breast tenderness
8. Breast enlargement
9. Gastrointestinal disturbances
10. Nausea
11. Vomiting
12. Pancreatitis
13. Headache
14. Dizziness
15. Seizures
16. Thrombophlebitis
17. Thromboembolism
18. Hypertension
19. Oedema
20. Increased risk of endometrial cancer
21. Increased risk of breast cancer
22. Increased risk of Cerebrovascular accident
23. Pulmonary embolism
24. Myocardial infarction
25. Cholestatic jaundice
26. Hepatic adenoma
Contra-indications of Ethinyl estradiol
1. Thrombophlebitis
2. Thromboembolic disorders
3. Estrogen dependent neoplasia
4. Undiagnosed genital bleeding
5. Estrogen dependent breast carcinoma
6. Hepatic impairment
7. Endometrial hyperplasia
8. Severe hypertension
9. Cholestatic jaundice
10. Dubin Johnson syndrome
11. Rotor syndrome
12. Haemoglobinopathies
13. Porphyria.
Special Precautions while taking Ethinyl estradiol
1. Cerebrovascular diseases
2. Coronary artery diseases
3. Migraine
4. Epilepsy
5. Heart failure
6. Hypertension
7. Diabetes mellitus
8. Renal impairment
9. Fibrocystic disease of breast
10. Abnormal mammographic findings
11. Asthma
Pregnancy Related Information
Contraindicated
Old Age Related Information
Use with caution
Breast Feeding Related Information
Contraindicated
Children Related Information
Contraindicated
Indications for Ethinyl estradiol
1. Female hypogonadism
2. Vasomotor menopausal symptoms
3. Menstrual disturbances
4. Certain cases of amenorrhoea
5. Male hyper sexuality
6. Mammary hypoplasia
7. Palliative treatment of certain breast cancer
8. Palliative treatment of prostatic cancer.
Interactions for Ethinyl estradiol
ACE Inhibitors: Antagonises hypotensive effect.
Anti-coagulants: Efficacy of anticoagulants reduced.
Antidiabetics: Antagonism of hypoglycaemic effect.
TCAs: Pharmacological effects of TCAs altered, increased incidence of toxicity.
Antifungals: Griseofulvin accelerates metabolism of ethinyl oestradiol, reduced contraceptive effect.
Barbiturates, Rifampicin: Efficacy of ethinyloestradiol reduced; failure of contraception.
Beta blockers: Hypotensive action antagonised.
Corticosteroids: Clearance reduced and elimination half-life of corticosteroids increased.
Cyclosporine: Increased plasma cyclosporine concentration.
Dantrolene: Hepatotoxicity, especially in women > 35 yrs of age.
Lab. Tests: With high doses of ethinyloestradiol: Increased Sulfobromophthalein retention. Increased Prothrombin and factors VII, VIII, IX & X; decreased antithrombin III; increased norepinephirine :induced platelet aggregability. Increased thyroid binding globulin (TBG) leading to increased circulating total thyroid hormone, as measured by PBI, T4 by column or T4 by radioimmuno assay. Free T3 resin uptake decreased, reflecting elevated TBG; Free T4 concentration unaltered. Impaired glucose tolerance, decreased pregnanediol excretion, reduced serum folate concentration, increased serum triglyceride and phospholipid concentration.
Typical Dosage for Ethinyl estradiol
Oral : 0.02 to 0.2mg/day
Female hypogonadism: 0.05mg 1 to 3 times daily for two weeks monthly followed by two week progesterone therapy. Continue for 3 to 6month dosing cycles followed by two months off.
Maintenance dosage: 0.025mg/day
Vasomotor menopausal symptoms: 0.025 to 0.05mg/day cyclically as 3 weeks on and 1 week off.
Mammary hypoplasia: 0.05mg/day for 12 days along with progesterone from 16th to 25th day.
Male hyper sexuality: 0.05mg/day
Palliative treatment of breast cancer: 1mg thrice daily for 3 months
Palliative treatment of prostatic cancer: 0.15mg to 2mg/day.
Schedule of Ethinyl estradiol
H
Storage Requirements for Ethinyl estradiol
Store at controlled room temperature at a range of 20 to 25 degree C.
Effects of Missed Dosage of Ethinyl estradiol
Take the missed dose as soon as noticed and if it is the time for next dose then skip the missed dose. Continue the regular schedule. Do not double the dose.
Effects of Overdose of Ethinyl estradiol
Provide symptomatic treatment and supportive care.

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