The effects of medications on stool?
Hello, doctor.
I have been seeing an ENT specialist for the past five days due to a cold and have been prescribed antibiotics along with a green pill that the doctor said is for the stomach.
I would like to ask if taking these medications can change the color of my stool.
My stool has become a bit darker and softer, and there are some black specks.
I am wondering if this is due to eating spinach or pig liver.
This morning, most of my stool was a normal light brown, but the end was slightly green.
Should I see a gastroenterologist for this, or is it more likely related to the medication, especially since the stomach pill is green? I usually don’t pay much attention, so I’m not sure if vegetables could also affect it.
Additionally, yesterday my brother accidentally cut himself while playing with my razor.
My mom was going to take him for a tetanus shot, but I remember that the vaccine has a certain duration of protection.
He received a tetanus shot last year after being stung by a bee.
I told my mom that it might not be necessary, but I’m not sure if that’s the right perspective.
Thank you for your response, doctor!
Cindy, 10~19 year old female. Ask Date: 2020/05/22
Dr. Hong Yuanbin reply Internal Medicine
Hello,
First, the color of stool can indeed vary due to food or medication.
Generally, when we are concerned about gastrointestinal bleeding, the stool may appear very dark, resembling the color of hair, and it is sticky, referred to as "melena." I believe your stool is not as dark as hair, so it is likely just a result of diet or medication, and there is no need for concern.
Second, the tetanus vaccine provides protection for five years, and unless there is a puncture wound from a rusty object, the risk is low.
Therefore, your brother does not need to receive the vaccine.
Thank you for your question.
Reply Date: 2020/05/22
More Info
When taking antibiotics, it's not uncommon to notice changes in stool color and consistency. Antibiotics can disrupt the normal balance of gut bacteria, which may lead to variations in digestion and absorption, resulting in changes to stool characteristics. In your case, the darker and softer stools you experienced could be attributed to the antibiotics you were prescribed, as well as the green medication you mentioned, which is likely a proton pump inhibitor or an antacid. These medications can sometimes cause changes in the color of your stool.
The presence of dark stools can also indicate the presence of blood, which is a concern. However, if you have recently consumed foods like spinach or liver, these can also contribute to darker stool colors due to their high iron content. The greenish tint at the end of your stool could be a result of bile pigments, which can occur when food moves through the intestines more quickly than usual, a common effect of antibiotics.
If your stool returns to a normal light brown color and you do not experience any other concerning symptoms such as abdominal pain, persistent diarrhea, or blood in your stool, it may not be necessary to see a gastroenterologist. However, if the changes persist or worsen, it would be prudent to consult a healthcare professional for further evaluation.
Regarding your brother's injury, it's important to consider the timing of his last tetanus shot. Tetanus vaccinations typically provide protection for about 10 years. If your brother received a tetanus shot last year, he should still be protected. However, if the wound is deep, dirty, or caused by a potentially contaminated object, it may be advisable to consult a healthcare provider to determine if a booster shot is needed. It's always better to err on the side of caution when it comes to potential infections.
In summary, changes in stool color after antibiotic use are generally not uncommon and can be influenced by various factors, including diet and the medications themselves. Monitoring your symptoms and consulting a healthcare provider if you have concerns is always a good practice. For your brother, checking the specifics of his last tetanus shot and the nature of his injury will help determine if further action is necessary.
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