Dandelion and astragalus have no contraindications, theoretically can be taken together in water, but it is still recommended to consult a doctor and take according to their own situation.
Dandelion has the effect of clearing heat and removing toxins (removing heat and toxins from the body), subduing swellings and dissipating lumps, and inducing diuresis and diaphoresis (improving the problem of incomplete urination and low urine output).
Dandelion can be used to treat furuncles (sores mostly occurring on the limbs or face, small in shape with deep roots, as hard as nails) swelling and poisoning, breast carbuncle, internal carbuncle, feverish gonorrhea (burning and stinging pains are obvious when urinating, accompanied by frequent urination and urgency, and discomfort of pulling in the abdomen) astringent pains, and jaundice with dampness-heat. Excessive dosage of this product can lead to slow diarrhea.
Astragalus has the effects of strengthening the spleen and tonifying the middle, elevating yang and lifting up the sun (raising the yang qi of the organism to lift up the sunken organs), benefiting the guards and consolidating the surface, diuretic, and supporting the toxicity of the muscles (discharging poisonous evils and promoting the growth of the muscles and the healing of wounds). It can be used to treat deficiency of spleen qi, deficiency of lung qi and deficiency of qi and blood. Note that this product should not be used by those who are suffering from superficial and solid evil, or whose sores are still full of heat and toxin at the beginning or after ulceration.
In summary, dandelion and astragalus and no contraindications, can be brewed together with tea to drink, but need to pay attention to is that the Chinese medicine brewing water to drink the active ingredients precipitation is limited, there is no treatment of disease efficacy and effect, so if there are uncomfortable symptoms, you should go to the hospital, under the guidance of a physician standardized treatment, do not unauthorized use of medication, so as not to cause adverse reactions.