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I have been on a clear liquid diet for today

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Posted on Wed, 23 Jan 2019
Question: I have been on a clear liquid diet for today because I am scheduled for a colonoscopy tomorrow. About an hour ago I vomited an amount of dark green fluid. Also an ache in my lower ride side
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Answered by Dr. Arnab Banerjee (26 minutes later)
Brief Answer:
follow the advice, observe how you stay afterwards...

Detailed Answer:
Hello there,
Welcome to 'Ask A Doctor' service...
I've gone through your query in details...

Well, the dark green liquid could very well be bile, it can happen due to prolonged duration of fasting/clear liquid intake...

I'd suggest taking an antiemetic (for nausea/vomiting) i.e. ONDANSETRON 4mg along with an antacid eg. OMEPRAZOLE 20mg (PRILOSEC) for now and observe how you stay thereafter...

Do ensure to keep drinking in small but frequent sips at regular intervals...

However, if despite following this, the ache doesn't subside within a while, or any further recurrence of vomiting, please don't wait any longer and inform your doctor as prompt check-ups will be needed in that scenario...

Let me know if I can assist you further...
Wish you good health...

Take Care
Kind Regards


Above answer was peer-reviewed by : Dr. Arnab Banerjee
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Answered by
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Dr. Arnab Banerjee

Critical Care Specialist

Practicing since :2012

Answered : 1336 Questions

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I have been on a clear liquid diet for today

Brief Answer: follow the advice, observe how you stay afterwards... Detailed Answer: Hello there, Welcome to 'Ask A Doctor' service... I've gone through your query in details... Well, the dark green liquid could very well be bile, it can happen due to prolonged duration of fasting/clear liquid intake... I'd suggest taking an antiemetic (for nausea/vomiting) i.e. ONDANSETRON 4mg along with an antacid eg. OMEPRAZOLE 20mg (PRILOSEC) for now and observe how you stay thereafter... Do ensure to keep drinking in small but frequent sips at regular intervals... However, if despite following this, the ache doesn't subside within a while, or any further recurrence of vomiting, please don't wait any longer and inform your doctor as prompt check-ups will be needed in that scenario... Let me know if I can assist you further... Wish you good health... Take Care Kind Regards