One of our hormone drugs, spironolactone (spiro), is a diuretic so we're often salt deprived and craving salty foods. I'm not 100% sure why pickles specifically but I know with estrogen my sense of taste changed and now I get cravings for things that is sometimes strong enough to be a distraction until I eat that food. Pickles are a common craving during pregnancy as well and HRT floods our systems with similar hormones.