Estrogen-Containing Oral Contraceptives Interactions

Estrogen-containing therapies should not be used with anastrozole as they may diminish its pharmacological action.

Source: NLP:anastrozole

Estrogen-containing therapies should not be used with anastrozole as they may diminish its pharmacological action.

Source: NLP:anastrozole tablets

Estrogen-containing oral contraceptives decrease lamotrigine concentrations by approximately 50%, requiring dose adjustment.

Source: NLP:lamotrigine

May affect valproate clearance. Monitoring of valproate concentrations is recommended.

Source: NLP:divalproex sodium

May increase serum thyroxine-binding globulin concentration, resulting in initial transient increase in FT4 followed by decreased serum T4.

Source: NLP:levothyroxine sodium

May increase serum thyroxine-binding globulin concentration, altering T3 serum transport. Closely monitor thyroid hormone parameters.

Source: NLP:liothyronine sodium

Decreased contraceptive efficacy and increased breakthrough bleeding, especially at doses greater than 200 mg/day.

Source: NLP:topiramate

Estrogen-containing hormonal contraceptives may affect valproate pharmacokinetics. Monitoring of valproate concentrations is recommended.

Source: NLP:valproate sodium

May affect valproate clearance. Monitoring of valproate concentrations recommended.

Source: NLP:valproic acid