Based on TCM, Horse Tail can be used to:

1. clears heat
2. stops bleeding
3. disperses wind-heat
4. clears the eyes
5. eliminates superficial visual obstruction.

Some indications that can be treated by this herb with specific dosage and formulation are wind-heat affecting the eyes with redness, pain, swelling, cloudiness, blurred vision, the pterygium or excessive tearing, and headaches. Also, heat in the blood causes hemafecia or hemorrhoids.

The pharmacological effect of this herb is anti-hypertensive, anti-inflammatory, diuretic, sedative, and antiplatelet actions.