Hi Juan:
When you say you have "stomach" pain, I am assuming you mean in the mid upper abdominal area. Peptobismol is not the best medication to alleviate stomach related issues such as gastritis and ulcers which could actually be the cause of your symptoms. Peptobismol can make stools look black, HOWEVER blood from a bleeding ulcer can make it black, tarry and foul smelling stools (this is called melena). If your stools are just solid black this is probably from the Peptobismol. Avoid any anti-inflammatory medications such as advil. Consider visiting your doctor or urgent care for further evaluation. Other organs can also cause pain where the stomach is located, such as the pancreas, and even the heart. Better be safe than sorry. Hopefully that helps, sincerely

Hi Juan

From the symptomatology it seems like a case of Gastroentritis.

Gastroenteritis is condition characterized by inflammation of the gastrointestinal tract that involves both the stomach and the small intestine , resulting in some combination of diarrhea, vomiting, and abdominal pain and cramping

the black stools is mostly indicative of blood in the stools.
hence, the cause is less likely to be viral and more likely to be bacterial


The primary treatment of gastroenteritis is rehydration. This is preferably achieved by oral rehydration therapy

Oral replacement therapy products made with complex carbohydrates (i.e. those made from wheat or rice), ORS also is very good option.

Personal measures (such as hand washing) have been found to decrease incidence and prevalence rates of gastroenteritis

Gastroenteritis is usually an acute and self-limiting disease that does not require medication.

But if it does not resolve with the above measures you can start a course of antibiotics such as Tab . Azithromycin