What is the appropriate emergency treatment for someone who has ingested five tablets of an antiretroviral (anti‑HIV) medication?

Emergency Management of Antiretroviral Medication Overdose

For someone who has ingested five tablets of an antiretroviral medication, provide supportive care and clinical monitoring without specific antidote therapy, as serious toxicity from antiretroviral overdose is rare and most patients experience minimal to no adverse effects.

Immediate Assessment and Management

Initial Evaluation

• Identify the specific antiretroviral agent(s) ingested - dosing, timing, and total amount
• Assess for symptoms of toxicity: nausea, vomiting, dizziness, drowsiness, or abdominal pain
• Obtain baseline vital signs and perform focused physical examination
• Do not induce emesis or perform gastric lavage - these are not indicated for antiretroviral overdose

Risk Stratification by Drug Class

The clinical approach depends on which antiretroviral class was ingested:

Integrase Inhibitors (e.g., raltegravir, dolutegravir)

• These have the best safety profile in overdose 1, 2
• A case report documented a patient who ingested 24,000 mg of raltegravir (60 times the normal dose) with no serious adverse events 1
• Another patient overdosed on dolutegravir with only transient elevation in creatinine that normalized within 12 weeks 2
• Management: Observation for 6-24 hours with supportive care

NRTIs (e.g., tenofovir, emtricitabine, lamivudine)

• Generally well-tolerated in overdose 3
• Monitor for lactic acidosis if patient develops fatigue, nausea, vomiting, or vague abdominal pain 4
• Check serum lactate if symptomatic
• Monitor renal function (serum creatinine, estimated GFR) particularly with tenofovir-containing regimens 2

Protease Inhibitors and NNRTIs

• Less data available but generally not associated with severe acute toxicity 3
• Most common effects: gastrointestinal symptoms (nausea, vomiting, diarrhea)

Clinical Monitoring Protocol

First 24 Hours

• Vital signs every 4 hours
• Continuous observation for development of symptoms
• Baseline laboratory testing:
  • Complete metabolic panel (electrolytes, renal function, liver enzymes)
  • Serum lactate (if symptomatic or taking NRTIs)
  • Complete blood count

Disposition Decisions

According to available data, 88.7% of antiretroviral-only exposures are not serious and can be managed outside a healthcare facility 3. However, given the intentional nature of a 5-tablet ingestion:

• If asymptomatic after 6-24 hours of observation: Patient may be medically cleared 1, 2
• If symptomatic: Admit for continued monitoring and supportive care
• All intentional ingestions require psychiatric evaluation before discharge 5

Specific Interventions

Supportive Care

• Intravenous fluids for hydration, particularly with protease inhibitors
• Antiemetics for nausea/vomiting (ondansetron, metoclopramide)
• Antimotility agents for diarrhea if needed
• No specific antidote exists for any antiretroviral medication

What NOT to Do

• Do not use activated charcoal - limited benefit and not routinely recommended
• Do not discontinue ongoing antiretroviral therapy in patients already on treatment (unless this was their medication)
• Do not perform hemodialysis - antiretrovirals are highly protein-bound and not dialyzable

Follow-Up Considerations

Post-Discharge Monitoring

• Recheck renal function in 1-2 weeks if tenofovir was involved 2
• Monitor for delayed mitochondrial toxicity (rare but possible with NRTIs): myopathy, neuropathy, hepatic dysfunction 4
• Mandatory psychiatric follow-up for intentional overdoses 5

Important Caveats

• Neonates and young children are at higher risk for serious toxicity from supratherapeutic doses 4
• Combination with other medications or substances increases risk and complexity
• The evidence base comes primarily from case reports and poison center data 3, 5, not controlled studies

Key Clinical Pearls

Most antiretroviral overdoses have excellent outcomes with supportive care alone. The majority of reported cases involved unintentional exposures and were managed successfully without serious complications 3. However, the context of intentional overdose (as suggested by ingesting 5 tablets) requires both medical monitoring and psychiatric intervention.

The psychiatric component is often more critical than the toxicological one - HIV-positive patients represent a high-risk group for medication overdose due to high rates of comorbid psychiatric disorders 1, 5.