Is it better to take Zhi Bai Di Huang Wan before or after a meal?

Zhi Bai Di Huang Wan is effective when taken on an empty stomach or before meals, with boiled water or lightly salted water. But if the spleen and stomach dysfunction patients, can be taken after meals, specific instructions for medication.
Zhi Bai Di Huang Wan is a proprietary Chinese medicine made of Chinese yam, Cornu Cervi Pantotrichum (made), Radix Rehmanniae Praeparata, Radix et Rhizoma Zhi Materiae, Poria, Mudan Pi, Zedoariae, and Cortex Phellodendron Bark.
This drug works to nourish yin and reduce fire, and is suitable for the treatment of night sweating (abnormal sweating after going to sleep and stopping after waking up), hot flashes, sore throat and dry mouth, spermatorrhea and tinnitus, and short and red urination (small amount of urination with dark yellow color) caused by yin deficiency and fire exuberance.
The adverse reactions and contraindications of this product are not clear. Pregnant women should take with caution. It is not suitable for patients with deficiency-cold condition, which is characterized by fear of cold, cold hands and feet, and a preference for hot beverages. It should not be taken at the same time with cold and flu medicines.
Zhi Bai Di Huang Wan is a tonic drug, should be taken on an empty stomach or before meals, boiled water or saline, if the spleen and stomach dysfunction can be taken after meals, specific instructions for medication.
Drugs should be taken under the guidance of a specialist, not unauthorized use of drugs.