Psyllium husk, rice-solid drinks, oat bran and barley are soluble and are a good diarrhea treatment. Wheat bran and whole grains are insoluble and good for constipation. Prevent diarrhea now, then use nutrition power for higher, more important purposes like absorption-increasing tricks for getting the best advantage from the protease inhibitor you re using. We can lose our appetit for any number of reasons. Nausea may happen because of a foul odor like herb sauces that stink, and it can also cause vomiting episodes.
Nausea responds well to dry, salty foods.
Crackers, potato chips, chicken broth whatever it takes. Stay in a well-ventilated area, or get to one before you really have to. Call your pharmacist or doctor for a remedy. Know what foods cause this, then avoid them. Also, sometimes this taste-change can reverse itself.