Mercurius Solubilis
Sweetish metallic taste. Salivary secretions greatly increased. Fetid odor from mouth, can smell all over room. Alveolar abscess, worse at night. Great thirst with moist mouth.

Calcarea Carbonica [Calc. c]
Sour taste. Mouth fills with sour water. Dryness of tongue at night. Offensive smell from mouth.