I've been browsing through a variety of publications and articles. I'm only finding that the opposite could be true. I even did a drug interaction taking my Apri to Lithium and no drug interactions were listed. With BC, the standard type of medication that can affect, efficacy are antibiotics.

Here's an article that discusses oral/ovarian 'steroid's and Lithium.
http://www.ncbi.nlm.nih.gov/m/pubmed/2113358/

Here's one discusing oral steroids in a most scientific manner. I'm thinking it's one in the same, in my most unprofessional, non chemistry trained, but educated guess because E2 and P4 are the, for article abbreviations for Estrogen and Progesterone..
http://www.fertstert.org/article/S00...565-3/abstract

Have you contacted, your pharmacist?

The searches I looked at, mention certain medications can reduce the sodium content of lithium. Other readings mentioned health risks if become pregnant. I'm not finding much else.

The thought of affecting bc, could be in reverse of concern for affecting lithium?

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