The generic name for Smoothie No. 5 is Dust Mite Drops No. 5. Allergic cough and phlegm can be treated with Dust Mite Drops 5 if it is caused by allergy to dust and mites, but it has no significant effect if it is caused by allergy to other substances. Dust Mite Drops No.5 can reduce or eliminate the symptoms of allergic reaction to dust mites by producing specific IgG blocking antibodies and enhancing the immune tolerance ability of dust mite-allergic patients, so as to achieve the therapeutic purpose. It can be used for the treatment of allergic asthma, allergic rhinitis, atopic dermatitis and allergic conjunctivitis caused by dust mite allergy. Unlike allopathic treatment, Dust Mite Drops 5 is an etiologic treatment for dust mite-induced allergic diseases. If the allergic cough is caused by dust and mite allergy, desensitization treatment may be effective. However, there is no indication for the use of Dust Mite Drops No. 5 in allergic coughs caused by other substances, such as allergies to animal hair and willow floss. Dust mite drops 5 is contraindicated in febrile infections or inflammations of the respiratory tract, asthma attacks, multiple sclerosis, autoimmune diseases, active stage of tuberculosis, and those with severely depressed renal function. Gastrointestinal discomfort, mild diarrhea, or worsening of allergic symptoms may occur during use. If the patient has allergic cough and phlegm symptoms, it is recommended to consult the hospital in a timely manner, under the guidance of the doctor to improve the examination, and follow the doctor’s instructions for treatment.