Could it be the PV equipment you are using? Sometimes things get gunked up and foul the taste of whatever you put in them.
I concur.
It could be you filled or dripped something that did not agree with you and now it has infected your devices. A good soaking in some spring water or PGA/Vodka followed by a few hours of air drying should do the trick to clean your toppers out.
Now this could be pure speculation on my half, but in my experience I started having issues with dessert flavors especially. They gave me vapor's tongue faster than anything else. This could be from ANY number of reasons but without a doubt, switching to NETs/TAs is what solved my juice issues.
I'm very picky too, but after vaping the same 2 or 3 juices for half a year now I'm still pleased with it in all ways. My favorite is Burley Beard from Velvet Cloud Vapor. It's mildly sweet, peppery, with a nice aged-tobacco finish. Funny too, because the first time I tried the stuff I thought they put a skunk dipped in ash inside the bottle.
Amazing what you end up loving the most.
I recommend:
1.) A THOROUGH cleaning of all your devices you plan on using
2.) Methodical maintenance of changing wicks, charging batteries, and ensuring you have the best vape your gear can provide. I change my wicks and dry burn every 24 hours for the cleanest flavor possible.
3.) STAY HYDRATED!!!
4.) Try unflavored
5.) Try new vendors
6.) If all else fails, change your wattage. What might taste "blah" at 8 watts can taste "WOAH!" at 25 watts, and absolutely horrible at anything over 30 watts. Find what wattage works best for you. For me it's around 25-30 watts for maximum throat hit. Tends to bring out the spicy peppery side of juices as well.
There are of course plenty of remedies for vaper's tongue such as gently smelling fresh ground coffee beans, gargling lemon juice, vaping some red hot cinnamon, etc... But in my experience it's likely one of the above reasons for juice that is no longer satisfying your needs.
Hope you get it figured out!
P.S. I'm familiar with the medicine smell you speak of. My drawer smells this way. But hey, gather up some cinnamons, some florals, and mints... things tend to get funky. It's just "one of those things" if you ask me. If that's a huge issue for you, keep your ADVs separate from the rest. Cross contamination and all that.
Vape well, vape often
