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You can search for [制酸剤] *seisanzai.*
But I’d consult directly with a pharmacist.
diarrhea is called 下痢（げり・ケリ・geri） go to your local drugstore and head to that section and pick something up. I have no direct experience with these products so cannot recommend or attest to their efficacy.
In Japan the go to thing is unfortunately a herbal remedy called Seirogan. One example :
It does however work for me to a certain degree, so it may be worth trying. I used to use Imodium all the time back home and never found an equivalent effect here – they are just too low dosage…
E: you might want to double check the other ingredients to make sure whatever you get isn’t a dual-acting product (“dual-acting” like Tylenol PM, which is acetaminophen (aka paracetamol) and diphenhydramine (brand name, Benadryl)).
DMed you a picture
Seirogan is used for diarrhea and upset stomachs. Do yourself a favor and get the coated kind – otherwise it tastes like a campfire.
You need to get a box of “Stopper” (no, I’m not kidding). ストッパ. But I don’t think you can get them on Amazon as it’ll need to be sold to you in the presence of a licensed pharmacist (no prescription needed though).
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*I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/japanlife) if you have any questions or concerns.*
You can search for [制酸剤] *seisanzai.*
But I’d consult directly with a pharmacist.
diarrhea is called 下痢（げり・ケリ・geri） go to your local drugstore and head to that section and pick something up. I have no direct experience with these products so cannot recommend or attest to their efficacy.
In Japan the go to thing is unfortunately a herbal remedy called Seirogan. One example :
【第2類医薬品】正露丸クイックC 16カプセル https://amzn.asia/d/6s3E3KC
It does however work for me to a certain degree, so it may be worth trying. I used to use Imodium all the time back home and never found an equivalent effect here – they are just too low dosage…
The active ingredient in Imodium AD is loperamide (ロペラミド) and [these are the hits for that on Amazon](https://www.amazon.co.jp/s?k=loperamide).
E: you might want to double check the other ingredients to make sure whatever you get isn’t a dual-acting product (“dual-acting” like Tylenol PM, which is acetaminophen (aka paracetamol) and diphenhydramine (brand name, Benadryl)).
DMed you a picture
Seirogan is used for diarrhea and upset stomachs. Do yourself a favor and get the coated kind – otherwise it tastes like a campfire.
You need to get a box of “Stopper” (no, I’m not kidding). ストッパ. But I don’t think you can get them on Amazon as it’ll need to be sold to you in the presence of a licensed pharmacist (no prescription needed though).
ストッパ下痢止め works for me, look for that