Hypogeusia is a reduced ability to taste things (to taste sweet, sour, bitter, or salty substances). The complete lack of taste is referred to as ageusia. Causes of hypogeusia include the chemotherapy drug bleomycin, an antitumor antibiotic as well as zinc deficiency.
Hypogeusia is often temporary and may resolve itself. If your hypogeusia is the result of an infection, allergy, or minor medical problem, correcting that problem usually helps to fully restore taste. Even if the problem is more serious, treating the underlying cause of hypogeusia can help to restore your sense of taste.