Thank you for posting your query.
plus is a good medicine, and is fairly safe. It lowers the BP in many patients. Please regularly check your BP to see if it is within the normal limits.
Black stools and blood vomiting
are not related to coversyl plus. Are you taking any blood thinners such as aspirin? Aspirin may cause these symptoms.
In any case, you should consult a doctor, to find out the cause and for treatment.
Wishing you good health,
Dr Sudhir Kumar MD (Medicine) DM (Neurology)