Solmack Q-Arl D


Designated second-class OTC drug


Antidiarrheal drug


  • Contains three active ingredients that are effective for symptoms of diarrhea: Loperamide Hydrochloride, the digestive enzyme Biodiastase 2000, and lactic acid bacteria Lactomin
  • Comes in easy-to-take chewable tablets that can be taken without water

Packaging Manufacturer's suggested retail price
12tablets JPY 1,320
(JPY 1,200 excluding tax)


The following precautions should be observed.

(If not observed, it may aggravate the current symptoms or increase the risk of adverse reactions.)
1. The following persons should not take this medicine.
Persons who have had an allergic symptom to this medicine or its ingredients.
2. This medicine should not be taken together with the following drugs.
Gastrointestinal analgesic/antispasmodic
3. After taking this medicine, do not drive a car or operate machinery (drowsiness may occur).
4. Do not drink alcohol before/after taking this medicine.


1. The following persons should consult a physician, pharmacist or registered salesperson before using this medicine.
(1) Persons under the treatment of a physician
(2) Persons with diarrhea with fever, bloody stool, or persistent mucous stool
(3) Persons with acute severe diarrhea, or diarrhea with symptoms such as abdominal pain, abdominal bloating, or nausea (Forcibly stopping diarrhea with this medicine may actually worsen the disease.)
(4) Persons with anal diseases or other conditions that should avoid constipation (This medicine may cause constipation.)
(5) Pregnant women or possibly pregnant women
(6) Nursing women
(7) The elderly
(8) Persons who have previously had allergic symptoms to medicines

2. The following symptoms may be adverse reactions to this medicine. If any of these symptoms occur, discontinue use of the medicine immediately and consult a physician, pharmacist or registered salesperson, showing this document.

Affected body systemSymptoms
Skin Rash/redness, itching
Gastrointestinal system

Constipation, abdominal bloating, abdominal discomfort Nausea, abdominal pain, vomiting, loss of appetite

Neuropsychiatric system Dizziness

The following serious symptoms may rarely occur after using this medicine. If any of these symptoms occur, immediately consult a physician.

Symptom nameSymptoms

Shock (anaphylaxis)

Symptoms such as itching of the skin, hives, hoarseness, sneezing, itchy throat, breathing difficulties, palpitations, and clouding of consciousness may occur immediately after taking this medicine.

Oculomucocutaneous syndrome (Stevens-Johnson syndrome),
toxic epidermal necrolysis

Hyperthermia, ocular hyperaemia, eye discharge, lip erosion, sore throat, or widespread skin rash/redness may persist or suddenly worsen.

Ileus-like symptoms (symptoms such as intestinal obstruction)

Severe abdominal pain, cessation of gas discharge (farting), vomiting, and severe constipation accompanied by abdominal bloating may occur.

3. The following symptoms may occur after using this medicine. If any of these symptoms persist or worsen, discontinue use of the medicine and consult a physician, pharmacist or registered salesperson, showing this document.


4. If symptoms do not improve after using this medicine for two to three days, discontinue use of the medicine and consult a physician, pharmacist or registered salesperson, showing this document.


Diarrhea caused by overeating/overdrinking, and diarrhea caused by getting chilled while asleep


Chew or dissolve the following amount in your mouth.
Stop taking once the diarrhea resolves.
Take at least four hours apart.

AgeSingle doseDaily dose
Adult (15 years and over) 2 tablets Twice
Under 15 years of age Do not take.

〈Precautions for dose and administration〉

(1) Strictly follow the prescribed dosage and administration.
(2) How to remove a tablet
As shown in the figure on the right, push the convex part of the PTP sheet containing the tablet strongly with your fingertips to break the aluminum foil on the back side and take out the tablet. (If you accidentally swallow the blister pack, it may penetrate the esophageal mucosa or cause other unexpected accidents.)

INGREDIENTS, CONTENTS, AND FUNCTION ((1 day's dose / 4 tablets)

Loperamide Hydrochloride 1mg Suppresses diarrhea by improving excessive intestinal movement and abnormal water absorption and secretion in the intestinal mucosa.
Biodiastase 2000 90mg Helps the digestion of undigested matter in the gastrointestinal tract.
Lactomin (Enterococcus faecalis) 20mg Lactobacillus (beneficial bacteria) regulates the disturbed balance of intestinal bacteria.

Inactive ingredients: D-mannitol, Xylitol, Microcrystalline Cellulose, Crospovidone, Dibasic Calcium Phosphate, Lactose Hydrate, Magnesium Aluminometasilicate, Magnesium Stearate, l-Menthol


(1) Store in a cool place, away from direct sunlight.
(2) Keep out of reach of children.
(3) Do not transfer to another container. (May result in misuse or alter the quality.)


Manufactured and distributed by DAISHO PHARMACEUTICAL CO., LTD
Dosage form Tablet
Packaging unit 12 tablets
Manufacturer’s suggested retail price JPY 1,320 (JPY 1,200 excluding tax)
JAN Code 4987117400311
Expiration 3 years


Distributor Contact: Customer Relations Office, Taiho Pharmaceutical Co., Ltd.
1-27 Kandanishiki-cho, Chiyoda-ku, Tokyo, 101-8444, Japan
Phone: 0120-4527-66
Business hours: 9:00–17:00 (Excluding weekends and holidays)