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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Does Doxycycline 100 Mg Cause Any Side Effect Such As Vomitting?

Hi,

I am a 33-year old male, 5'10", and 75 Kgs. I came from a flooded area last week. I have a wound on my foot so I asked my doctor to prescribe me a prophylactic against leptospirosis. My doctor prescribed Doxycycline 100 mg capsule to be taken twice a day for five days. As directed on the drug handbook, I take it one hour before meals. Today is the fourth day I'm taking this drug. This morning, I was nauseated and there was one vomiting episode about 1 hour after I took the drug. The initial vomit was light-greenish (I think that's the drug itself) and the last part of the vomit was darker.

I'm just wondering if the darker vomit contains blood or if it was because I ate chips ahoy last night (about 9 hours ago). What signs and symptoms should I watch for which would prompt me to go to the hospital? Thank you.
posted on Fri, 14 Mar 2014
Twitter Sat, 3 May 2014 Answered on
Twitter Sat, 3 May 2014 Last reviewed on
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General & Family Physician 's  Response
Hello
As you mentioned that you are taking DOXYCYCLINE 100 mg twice in day and today is 4th day .
Vomited twice , so in my opinion this vomiting is a side effect of Doxy .
The most common side effects of doxy are nausea , G I upsets , dysphagia .
Usually the color of vomits depends upon whatever you ate , so this darker color may be due to your food or due to Doxy.
When such patient visit to me I prescribe them Stemetil M D with pantaprazole - D one hour after meal .
Still you feel discomfort consult your doctor .
If vomiting recur then also consult your doctor.
Good luck.
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Does Doxycycline 100 Mg Cause Any Side Effect Such As Vomitting?

Hello As you mentioned that you are taking DOXYCYCLINE 100 mg twice in day and today is 4th day . Vomited twice , so in my opinion this vomiting is a side effect of Doxy . The most common side effects of doxy are nausea , G I upsets , dysphagia . Usually the color of vomits depends upon whatever you ate , so this darker color may be due to your food or due to Doxy. When such patient visit to me I prescribe them Stemetil M D with pantaprazole - D one hour after meal . Still you feel discomfort consult your doctor . If vomiting recur then also consult your doctor. Good luck.