Can I drink Ophiopogon japonicus during pregnancy? This is a problem often faced by those trying to conceive. Ophiopogon japonicus is a traditional Chinese medicinal material that is widely used in the field of traditional Chinese medicine. It is believed to have the effect of nourishing yin, clearing away heat, nourishing yin and moisturizing the lungs, and is often used to treat symptoms such as lung heat and dry mouth and tongue.