It is Very Important as @Zoffiel says - about getting an audit on your medications, in case some actually contraindicate/have adverse affects to your BC meds! My niece is a Pharmacist - and whilst most that she audits are the elderly who change Drs when moving from home to an Aged Care facility & change of Drs .... our day to day drugs (including over the counter stuff) MAY seriously affect our health whilst going thru BC treatment.
So far, I've been lucky & I haven't needed tabs - and I hope that continues. Sadly, my uke friend with Met BC does now takes valium - as a result of her grandson's tragic death a few weeks ago.
If you have ANY anxiety/sleep issues or become deeply unhappy - PLEASE get professional advice - and don't just take what is in your cupboard. xx