Hello:
Through research on this topic, the general rule is:
*Contact your doctor if you experience bloody, black, or tarry stools or blood in the vomit.*
These symptoms could indicate damage to the gastrointestinal tract, and should be ruled out as soon as possible to prevent furter damage/risk.
If you drink more than three alcoholic beverages a day, ibuprofen may increase the risk of stomach bleeding.
If you drink alcohol & take pain medication frequent in nature, you are at higher risk of developing scarring of the liver (cirrhosis) and problems with your esophagus and stomach that can also cause sudden & severe bleeding.
In any event, the best advice is from a professional Physician to rule out any or all possible damage to your internal organs.
**This information is for educational suggestion only, and in no way should take precedence over the advice of your health care provider.**
For additional information on the topic, please see the following URL:
http://www.rxlist.com/cgi/generic3/combunox_wcp.htm
I hope this information was helpful. I wish you the best, take care!