A classical formula designed to nourish the body's moisture and cool the Lungs, primarily used for dry, sore throats with a parched feeling in the nose and mouth. It is well suited for chronic sore throat, dry cough, and throat inflammation that arise from an underlying deficiency of the body's fluids, leaving the Lungs and throat dry and vulnerable to irritation or infection.

The condition this formula addresses begins with a pre-existing constitutional weakness of Yin, particularly in the Lungs and Kidneys. The throat is the gateway of the Lungs, and the foot Shao Yin Kidney channel runs through the throat area. When the Yin of these two organs is depleted, the body's internal moistening and cooling capacity is compromised. This creates a state of latent internal Heat (sometimes described as 'smoldering Heat') in the upper body.

When a person in this vulnerable state is then exposed to seasonal Dryness, epidemic toxins, or irritating acrid-hot foods, these external factors meet the internal deficiency and quickly ignite a flare-up in the throat. The throat, deprived of its normal nourishing fluids and assaulted by both internal deficiency-Heat and external toxic-Heat, develops characteristic signs: white membrane-like deposits that cling stubbornly, swelling, soreness, dry nose, parched lips, and a dry cough. The pulse is typically rapid but weak or thready, reflecting the combination of Heat (rapid) and underlying deficiency (weak/thready).

The key insight of this formula's creator is that treating the throat toxin alone (with strong Heat-clearing or harsh detoxifying herbs) would further injure the already depleted Yin fluids and worsen the condition. Instead, the primary strategy must be to replenish the Yin and fluids of the Lungs and Kidneys, which both removes the root cause of the deficiency-Heat and restores the throat's natural protective moisture. The toxic pathogen is then addressed secondarily through mild, cool dispersing action.