Estrogen-containing oral contraceptives decrease lamotrigine concentrations by approximately 50% and decrease levonorgestrel by 19%.
Source: NLP:lamotrigine
Estrogen-Containing Oral Contraceptive Preparations (Ethinylestradiol And Levonorgestrel) Interactions
2 interactions on record
Estrogen-containing oral contraceptives decrease lamotrigine concentrations approximately 50% and decrease levonorgestrel by 19%.
Source: NLP:lamotrigine extended-release