In adults, Imodium can be taken up to four times a day, for two days, for the managment of diarrhea. It will likely remain in your system for at least a half-day but the effects of this drug are not the same in all people. Some people require taking this medication after each loose bowel movement (up to four times a day), while others may not need such a high dose. Any beneficial response would likely be highly individualized.
If your surgeon recommended this medication for your particular condition, he/she would likely be the best source for a patient-specific recommendation.
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