30 minutes before meals, twice daily (morning and afternoon), taken warm. After taking the formula, it is traditionally advised to wrap the lower body warmly to promote a gentle sweat.

Typically prescribed for 2 to 4 weeks for acute edema or flare-ups, and may be continued for 4 to 8 weeks or longer for chronic conditions such as nephritis or persistent lower limb edema, with periodic reassessment by a practitioner.

Avoid cold, raw, and greasy foods that burden the Spleen and generate further Dampness (ice cream, raw salads, fried foods, excessive dairy). Reduce salt intake, as excess sodium promotes fluid retention and works against the formula's edema-reducing action. Favor warm, easily digestible, bland foods that support the Spleen: cooked grains (rice, millet), lightly steamed vegetables, soups, small amounts of lean protein. Foods with gentle Dampness-draining properties such as Job's tears (yi yi ren), adzuki beans, winter melon, and corn silk tea are helpful additions. Avoid excessive tea and water intake, as overconsumption of fluids in a Spleen-deficient state can worsen water retention.

Fang Ji Huang qi Tang is a representative formula for treating patterns such as Wind-Water and Wind-Damp with Exterior Deficiency. Key symptoms include sweating with aversion to wind, difficulty urinating, white tongue coating, and a floating pulse. In modern practice, this formula is commonly used to treat chronic glomerulonephritis, cardiac edema, and rheumatoid arthritis.

Diuretics (thiazides, furosemides, spironolactone): This formula has inherent diuretic properties through Fang Ji and Huang Qi. Concurrent use with pharmaceutical diuretics may potentiate fluid and electrolyte loss, particularly potassium depletion, and should be monitored.

Antihypertensives: Tetrandrine from Fang Ji has demonstrated blood pressure-lowering effects in animal studies. Combined use with antihypertensive drugs could result in additive hypotensive effects. Blood pressure should be monitored if used concurrently.

Corticosteroids and immunosuppressants: Research has shown that tetrandrine can synergistically potentiate the immunosuppressive effects of glucocorticoids such as methylprednisolone. While this may be therapeutically beneficial in some clinical contexts, it requires dose adjustment and careful monitoring to avoid over-immunosuppression.

Digoxin and cardiac glycosides: Gan Cao (Licorice) can cause pseudoaldosteronism with potassium loss when taken in significant doses over extended periods. Hypokalemia increases the risk of digoxin toxicity. Potassium levels and cardiac function should be monitored.

Warfarin and anticoagulants: Huang Qi and Gan Cao may have mild effects on platelet function and drug metabolism. Although clinically significant interactions are not well-documented, INR monitoring is advisable with concurrent anticoagulant use.