Gastrointestinal Issues Treatment

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Patient Information

Gastrointestinal (GI) issues — including nausea, vomiting, and diarrhoea — are among the most common presentations in urgent care. They are most frequently caused by viral or bacterial infections (gastroenteritis), food intolerance or food poisoning, or stress and anxiety. While most acute GI illnesses resolve within a few days, dehydration is a significant risk — particularly in the young, elderly, and immunocompromised — and should always be assessed and managed promptly.

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Common Causes

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Viral Gastroenteritis

The most common cause of acute GI illness. Viruses inflame the stomach and intestines, causing rapid-onset nausea, vomiting, and diarrhoea. Typically self-limiting within 1–3 days.

Norovirus Rotavirus

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Bacterial Infection

Bacteria from contaminated food or water infect the GI tract. Symptoms may include blood or mucus in stool and fever. Often requires antibiotic treatment.

Salmonella E. coli Campylobacter

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Food Intolerance & Poisoning

Reactions to specific foods or consumption of spoiled or contaminated food. Symptoms typically begin within hours of eating and may resolve without treatment.

Lactose intolerance Food poisoning

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Stress & Anxiety

The gut-brain axis means that psychological stress can directly affect gut motility, causing nausea, cramping, and changes in bowel habits even without an infectious cause.

IBS Stress response

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Parasitic Infection

Parasites from contaminated water or food can cause persistent GI symptoms. More common in travellers returning from affected regions. Stool testing confirms the diagnosis.

Giardia Cryptosporidium

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Medication Side Effects

Many medications — including antibiotics, NSAIDs, and certain supplements — can disrupt normal GI function and cause nausea, diarrhoea, or abdominal discomfort.

Antibiotics NSAIDs Iron supplements

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Signs & Symptoms

Nausea and vomiting Onset can be sudden, particularly with viral or bacterial causes — frequency and severity vary with the underlying trigger

Diarrhoea Loose or watery stools, sometimes containing blood or mucus — blood in stool requires prompt medical evaluation

Abdominal cramps or bloating Cramping pain throughout the abdomen, often relieved temporarily after a bowel movement; bloating from gas and fluid accumulation

Loss of appetite Reduced desire to eat, often accompanied by queasiness — important to maintain fluid intake even when solid food is not tolerated

⚠️ Watch for signs of dehydration — seek care promptly if present

Dry mouth and increased thirst

Reduced or dark-coloured urine

Dizziness or light-headedness

Fatigue and weakness

Sunken eyes or dry skin

Rapid heartbeat

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Diagnostic Labs

Stool Sample Infection Suspected

A stool culture or microscopy analysis is used to identify bacterial, viral, or parasitic pathogens responsible for GI symptoms. This is particularly important when symptoms are severe, prolonged, bloody, or when there is a history of recent travel to areas with high rates of waterborne or foodborne illness. Results guide targeted antibiotic or antiparasitic treatment.

Blood Tests Dehydration or Underlying Conditions

A blood panel including full blood count, electrolytes, renal function, and inflammatory markers helps assess the degree of dehydration, identify electrolyte imbalances from prolonged vomiting or diarrhoea, and screen for underlying systemic conditions that may be contributing to or complicating the GI illness.

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Treatment Options

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Rehydration is the single most important treatment Replacing lost fluids and electrolytes is the cornerstone of GI illness management. Oral Rehydration Solutions (ORS) are more effective than plain water as they replace both fluids and essential electrolytes lost through vomiting and diarrhoea.

Rehydration — Oral Rehydration Solutions & Fluids Small, frequent sips of oral rehydration solution, clear broths, or diluted juice are recommended. Plain water alone is insufficient for significant fluid loss. Intravenous fluids may be required in severe dehydration cases managed in a clinical setting.

Oral rehydration solution (ORS) Clear broths Electrolyte drinks

Anti-nausea Medications Antiemetic medications reduce nausea and the urge to vomit, allowing patients to tolerate oral fluids and begin rehydration. Prescribed when nausea is severe or preventing adequate fluid intake.

Ondansetron Promethazine

Antidiarrhoeal Medications Used to slow intestinal motility and reduce the frequency of loose stools. These are most appropriate for non-infectious or viral diarrhoea and should be used with caution — they are generally not recommended when bloody diarrhoea or bacterial infection is suspected, as slowing transit may worsen the condition.

Loperamide Use with caution in bacterial infection

Antibiotics Prescribed only when a bacterial infection is confirmed or clinically strongly suspected — based on stool culture results, severity of symptoms, or the presence of blood in stool. Antibiotics are not appropriate for viral gastroenteritis and routine use is discouraged to prevent resistance.

Only for confirmed bacterial infection

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Follow-Up Guidance

Return if symptoms persist beyond 2–3 days or worsen

Most viral GI illnesses resolve within 1–3 days. If symptoms fail to improve or continue to worsen beyond 2–3 days of onset, further evaluation is needed to rule out a bacterial infection, parasitic cause, or an underlying GI condition requiring specific treatment.

Return immediately if you notice blood in stool or vomit

Blood in stool (which may appear red, dark, or tarry) or blood in vomit are warning signs that require prompt medical assessment. These findings can indicate a more serious condition including significant bacterial infection, GI bleeding, or bowel inflammation and should not be waited out.

Seek care promptly for signs of dehydration

If you or a family member develops signs of dehydration — including reduced urination, dizziness, dry mouth, rapid heartbeat, or unusual weakness — seek medical attention promptly. Dehydration can progress quickly in young children, elderly patients, and those with underlying health conditions.

Same-day care available

Walk in or book a same-day appointment. Call first for urgent care — average wait under 15 minutes.

Schedule a Visit Online Consult — $89

Or call 202.463.5141

💧 Quick Facts

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Rehydration is first priorityORS replaces both fluids and electrolytes more effectively than plain water

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Bloody stool needs prompt careDo not wait — return immediately if blood appears in stool or vomit

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Antibiotics only for bacterial causesNot effective against viral gastroenteritis — stool culture guides prescribing

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Return after 2–3 days if no improvementSymptoms that persist or worsen warrant further evaluation

🕐 Clinic Hours

Mon – Fri8:00 am – 5:00 pm

Saturday8:30 am – 1:00 pm

SundayClosed

📍 Find Us

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Address908 New Hampshire Ave NW
Suite 400, Washington, DC 20037
(24th and I)

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Phone202.463.5141

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PaymentMost insurance plans ,Medicare accepted & all major credit cards