---

Clinical Assessment: 21-Year-Old Female, ICU - Fever + Seizure

---

Immediate Clinical Interpretation

Key distinction: "Febrile seizure" as a benign entity applies to children 6 months - 6 years old. In a 21-year-old, seizure + fever = acute symptomatic seizure until proven otherwise. The priority is to exclude CNS infection, autoimmune encephalitis, and metabolic causes.

---

Differential Diagnosis (Priority Order)

Must Rule Out First (Dangerous):

1. Bacterial Meningitis - fever + seizure, neck stiffness, altered sensorium
2. Viral Encephalitis (HSV, Enterovirus, Arbovirus) - fever + behavioral change + seizure
3. Cerebral Malaria - if relevant endemic area; fever + seizure in young female
4. Autoimmune Encephalitis (Anti-NMDAR - especially young females) - seizure, psychiatric symptoms, movement disorder
5. Cerebral Venous Sinus Thrombosis (CVST) - young female, headache, focal signs, seizure

Secondary Causes:

1. Metabolic derangements - hyponatremia (<115 mEq/L), hypoglycemia, hypocalcemia, uremia
2. Sepsis-associated encephalopathy
3. Drug toxicity / withdrawal
4. Typhoid or other systemic infections with neurological involvement (rare)
5. New-onset epilepsy triggered by intercurrent febrile illness

---

Immediate Stabilization (ABCs First)

1. Airway - position patient lateral (recovery), suction if needed; do NOT insert anything in mouth
2. Oxygen - high-flow O2 via face mask, pulse oximetry
3. IV access - establish immediately
4. Cardiac monitor - continuous monitoring
5. Bedside glucose - exclude hypoglycemia as the immediate reversible cause
6. Time the seizure - if >5 minutes ongoing, treat as Status Epilepticus

---

Pharmacological Management of Active Seizure

First-Line: Benzodiazepines

• Repeat benzodiazepine dose once if seizure continues after 5 minutes
• Benzodiazepines are more effective the earlier they are given - do NOT delay

Second-Line (if seizure persists after 2 benzodiazepine doses):

• Levetiracetam 60 mg/kg IV (max 4.5 g) - preferred for safety profile in young women (no teratogenicity concern as acute dose, good tolerability)
• Valproic acid 40 mg/kg IV - avoid if pregnancy possible (teratogenic); check pregnancy test
• Fosphenytoin 20 mg PE/kg IV - effective but cardiac monitoring required

Refractory Status Epilepticus (seizure persists after second-line):

• Midazolam infusion 0.05-0.4 mg/kg/h (titrate to seizure cessation)
• Propofol infusion (ICU, intubated patient)
• Pentobarbital coma in extreme refractory cases (Miller's Anesthesia, Tintinalli's)

---

Diagnostic Workup (Urgent - Run Parallel to Treatment)

Bedside / Stat Labs:

• Blood glucose (immediate)
• Serum electrolytes: Na, K, Ca, Mg - key seizure triggers per Rosen's:
  • Na < 115 mEq/L
  • Ca < 5.0 mg/dL
  • Mg < 0.8 mg/dL
  • Glucose < 36 mg/dL
• CBC with differential (leukocytosis suggests infection)
• Renal function (BUN, creatinine)
• LFTs
• Pregnancy test (mandatory in female of childbearing age - affects drug choice)
• Blood cultures (before antibiotics)
• ABG if altered sensorium / respiratory compromise
• Malaria smear / RDT (if endemic area)

Neuroimaging:

• CT brain (non-contrast + contrast) - urgent; rule out mass, abscess, hemorrhage, CVST (with CT venography if suspected)
• MRI brain with gadolinium - superior for encephalitis, autoimmune, hippocampal changes, cortical abnormalities (if CT inconclusive)

Lumbar Puncture (LP):

• After CT rules out raised ICP - perform LP for:
  • CSF analysis: cells, protein, glucose, culture, Gram stain
  • CSF viral PCR (HSV, Enterovirus)
  • CSF for autoimmune panel if clinical suspicion (anti-NMDAR, anti-LGI1, anti-CASPR2 antibodies)
• Do NOT delay empirical antibiotics/antivirals waiting for LP if meningitis/encephalitis is strongly suspected

EEG:

• After acute stabilization, obtain EEG to rule out non-convulsive status epilepticus (NCSE) and characterize epileptiform activity

---

Empirical Treatment While Awaiting Results

---

Special Considerations for This Patient (21F)

• Autoimmune encephalitis - anti-NMDAR encephalitis is the most common autoimmune encephalitis in young women, presenting with seizures, psychiatric symptoms, fever. Send serum and CSF NMDAR antibodies.
• CVST - young women (especially if on OCPs) are at risk; check for headache, papilledema; do CT venogram or MRI venogram
• Pregnancy - must check; affects anticonvulsant choice (valproate is avoided in pregnancy)
• Malaria - if in or returned from endemic area, cerebral malaria is a key differential

---

ICU Monitoring Priorities

• Neurological status every 15-30 minutes (GCS)
• Continuous cardiac monitoring (cardiac arrhythmias can accompany seizures, especially temporal lobe origin per Rosen's)
• Temperature control (antipyretics - paracetamol; cooling if needed)
• Fluid balance (avoid hyponatremia correction too fast if present)
• Watch for post-ictal complications: aspiration, rhabdomyolysis, neurogenic pulmonary edema

---

Summary Algorithm

Fever + Seizure (21F, ICU)
          ↓
ABC + O2 + IV access + glucose
          ↓
Active seizure? → Lorazepam IV 0.1 mg/kg (repeat once)
          ↓
Stat labs + CT brain (urgent)
          ↓
LP after CT (if no CI)
          ↓
Empirical Ceftriaxone + Acyclovir + Dexamethasone
(if CNS infection suspected)
          ↓
Second-line AED if seizure persists
(Levetiracetam preferred in young female)
          ↓
Specific treatment based on confirmed etiology

---

• Rosen's Emergency Medicine, Ch. 88 & 14 - Status epilepticus, diagnostic workup
• Tintinalli's Emergency Medicine, Ch. 138 - Seizure management protocol, ED treatment
• Bradley and Daroff's Neurology in Clinical Practice - Febrile seizures, complex features, genetics
• Katzung's Basic and Clinical Pharmacology, 16th Ed. - Benzodiazepine mechanisms, diazepam/lorazepam for status epilepticus
• Miller's Anesthesia, 10th Ed. - Refractory and super-refractory status epilepticus

---

Status Epilepticus (SE) - Management Algorithm

---

The Algorithm - From Rosen's Emergency Medicine (American Epilepsy Society)

---

The Algorithm - From Tintinalli's Emergency Medicine

---

Phase-by-Phase Breakdown

PHASE 1 - Stabilization (0-5 min)

• Position patient, protect airway (lateral decubitus)
• O2 via face mask / nasal cannula; consider intubation if airway unprotected
• Continuous cardiac monitoring + pulse oximetry
• IV/IO access (large bore) - use IO if IV not possible within 1-2 min
• Bedside glucose immediately - if glucose <60 mg/dL: give thiamine 100 mg IV first, then 50 mL D50W IV
• Draw blood: electrolytes, glucose, Ca, Mg, CBC, renal/liver function, toxicology screen, AED levels (if on AEDs)
• Time the seizure from onset

---

PHASE 2 - Initial Therapy / First-Line (5-20 min) - BENZODIAZEPINES

• Phenobarbital IV 15 mg/kg (Level B)
• Rectal diazepam 0.2-0.5 mg/kg (max 20 mg) - Level B
• Intranasal or buccal midazolam - Level B

Delays in benzodiazepine administration >10 minutes are associated with higher mortality, longer seizure duration, and more complications. Do not wait for IV access - give IM/IN/buccal immediately.

---

PHASE 3 - Second-Line Therapy (20-40 min)

Consider intubation at this stage for airway protection, especially if second-line drugs are being loaded.

---

PHASE 4 - Refractory Status Epilepticus (40-60 min)

---

PHASE 5 - Super-Refractory Status Epilepticus (>24 hours)

• Inhaled anesthetics (isoflurane)
• Ketamine (NMDA receptor antagonism)
• Vagal nerve stimulation
• Electroconvulsive therapy (ECT) - evidence limited
• Therapeutic hypothermia - NOT beneficial (Goldman-Cecil)
• Transfer to specialized neuro-ICU with continuous EEG

---

Key Principles Summary

---

Systemic Complications to Monitor

• Respiratory: Hypoxia, aspiration, neurogenic pulmonary edema
• Cardiac: Dysrhythmias, hypotension (especially from AEDs), myocardial depression
• Metabolic: Hyperthermia, metabolic acidosis, hypoglycemia, hyponatremia
• Renal: Rhabdomyolysis (from prolonged muscle contractions) → acute kidney injury
• Neurological: Non-convulsive status epilepticus (NCSE) after motor activity stops - EEG mandatory
• GI: Ileus from AEDs, gut ischemia (Miller's)

---

• Rosen's Emergency Medicine, 9th Ed., Ch. 169 - American Epilepsy Society algorithm
• Tintinalli's Emergency Medicine, Ch. 171 - SE treatment flowchart
• Goldman-Cecil Medicine, Ch. 372 - SE phases and drug doses
• Miller's Anesthesia, 10th Ed., Ch. 33 - Refractory/super-refractory SE, ICU management

---

Clinical Pharmacist Review - Mrs. VL (21F, ICU)

---

Patient Summary

---

Laboratory Findings - Interpretation

• Leukocytosis with neutrophilia - supports infectious etiology (CNS infection cannot be excluded without CSF)
• Hypoalbuminemia (Albumin 3 g/dL) - critically important: phenytoin is 90% protein-bound; low albumin means higher free (active) phenytoin levels at standard doses - risk of toxicity
• Electrolytes normal - metabolic seizure trigger excluded

---

Drugs Prescribed - Review

Day 1 (04/07/2026) - Prescription Chart

Day 2 (05/07/2026)

---

Pharmacist Interventions

---

🔴 Intervention #1 - Ceftriaxone: Indication Justification Needed + CSF Penetration

• Confirm whether LP was performed. If CNS infection (meningitis) is being empirically treated, ceftriaxone dose should be 2g IV BD (not 1g) for adequate CSF penetration.
• The standard adult meningitis dose of ceftriaxone is 2g IV every 12 hours, as CSF penetration of ceftriaxone is only adequate at higher doses.

• Harrison's Principles of Internal Medicine, 22nd Ed. - bacterial meningitis treatment: ceftriaxone 2g IV q12h
• Rosen's Emergency Medicine - empirical coverage for CNS infection in SE requires doses adequate for CSF penetration
• IDSA Guidelines for Bacterial Meningitis (Tunkel et al.) - ceftriaxone 2g IV q12h for bacterial meningitis in adults

---

🔴 Intervention #2 - Ringer Lactate: Incompatibility with Phenytoin

• Adams and Victor's Principles of Neurology, 12th Ed.: "Phenytoin must be given through a freely running line with normal saline (it precipitates in other fluids)"
• Tintinalli's Emergency Medicine, Ch.171: "Phenytoin should not be mixed with any glucose-containing IV fluid"
• Katzung's Basic & Clinical Pharmacology, 16th Ed.

---

🟡 Intervention #3 - Levetiracetam: Dose Too Low for Status Epilepticus

• Recommended SE dose: 1000-4500 mg IV (20-60 mg/kg) over 10-15 minutes

• Rosen's Emergency Medicine, Table 14.2 - "Levetiracetam: 1000-4500 mg over 10-15 mins (40-60 mg/kg for SE; maximum 4500 mg)"
• Tintinalli's Emergency Medicine, Ch.171: "The dose is 20 to 60 milligrams/kg IV"
• American Epilepsy Society Guidelines 2016 (Glauser et al., Epilepsy Curr): IV levetiracetam 60 mg/kg (max 4500 mg) as second-line agent in SE

---

🔴 Intervention #4 - Phenytoin: Dose, Rate, Monitoring Concerns

• 15 mg/kg × 55 kg = 825 mg → The 800 mg dose is approximately correct if patient weight ~53-55 kg. However, weight is not documented in the case sheet - this is a critical gap. Dose should be weight-based and documented.

• At 50 mg/min: 800 mg = 16 minutes minimum
• Risk of hypotension and cardiac arrhythmia if infused too fast (patient already has BP 100/60 mmHg!)

Corrected Phenytoin = Measured level ÷ [(0.2 × albumin) + 0.1] (or for normal albumin of 4.4 g/dL)

• Adams and Victor's Principles of Neurology, 12th Ed.: "Loading dose (20 mg/kg) at <50 mg/min; BP and ECG monitoring"
• Tintinalli's Emergency Medicine: "Cardiac monitor, BP every 5-15 min during infusion; hypotension → stop infusion"
• Rosen's Emergency Medicine, Ch. 14

1. Document patient weight and confirm dose is appropriate
2. Prescribe specific infusion rate ≤50 mg/min with cardiac and BP monitoring
3. Reduce infusion rate given baseline hypotension (BP 100/60); start at 25 mg/min
4. Monitor free phenytoin levels (or correct for albumin)

---

🟡 Intervention #5 - Phenytoin 200 mg TID (Day 2): Dose Too High + Inappropriate Frequency

• Oral: 200-300 mg/day (once or twice daily)
• IV: The same doses apply; phenytoin has a long half-life (~22 hours) allowing once-daily or BD dosing

• Katzung's Basic & Clinical Pharmacology, 16th Ed.: phenytoin maintenance 300-400 mg/day
• Goodman & Gilman's Pharmacological Basis of Therapeutics - phenytoin therapeutic range 10-20 mcg/mL; TDM required
• NICE Guidelines CG137 (Epilepsies): individualize AED dosing; phenytoin typically 200-300 mg/day in adults

1. Reduce to phenytoin 200 mg IV/PO BD (400 mg/day) or 300 mg once daily
2. Order serum phenytoin level (TDM) - target 10-20 mcg/mL total; correct for hypoalbuminemia
3. Plan transition from IV to oral phenytoin (or oral levetiracetam - better tolerated, no TDM needed) once patient is alert and tolerating oral

---

🟢 Intervention #6 - Missing Drug: Antibiotic Indication Verification + Missing Antiviral

• Was LP/CSF done? Were CSF herpes PCR sent?
• If encephalitis suspected: add Inj. Acyclovir 10 mg/kg IV q8h (for 60 kg = 600 mg q8h)

• Harrison's Principles of Internal Medicine, 22nd Ed. - HSV encephalitis empirical treatment: Acyclovir 10 mg/kg IV q8h × 14-21 days

---

🟢 Intervention #7 - Missing: Vitamin B6 (Pyridoxine) Consideration

---

Summary of Pharmacist Interventions

---

Recommended Treatment Regimen

ICU Phase (Days 1-3):

Step-Down / Maintenance (Days 3-7):

---

Discharge Plan

Medications at Discharge:

• Tab. Levetiracetam 500 mg PO BD × 3-6 months (or as directed by neurologist) - preferred over phenytoin for a 21-year-old woman (no teratogenicity, no TDM needed, better cognitive profile)
• If phenytoin is continued: Tab. Phenytoin 100 mg BD or 200 mg OD with monthly TDM

Investigations at Discharge:

• Serum phenytoin level (if continuing phenytoin) - target 10-20 mcg/mL
• EEG (if not done during admission)
• MRI brain (if not done - to rule out structural cause)
• CSF report follow-up (if LP done)
• Repeat CBC, LFT, albumin after 2 weeks

Follow-Up:

• Neurology OPD in 1-2 weeks
• Repeat EEG at 1 month
• If two seizure episodes (present + 2 years ago) confirmed - patient likely needs long-term AED therapy per ILAE/NICE guidelines (2 unprovoked seizures = epilepsy diagnosis)

Patient / Caregiver Counseling:

1. Do not stop AED abruptly - risk of status epilepticus
2. Driving restriction - do not drive until seizure-free for 6-12 months (as per state regulations)
3. Avoid swimming alone, heights, operating machinery
4. Fever is a seizure trigger - treat fever promptly with paracetamol
5. Adequate sleep and stress reduction - sleep deprivation lowers seizure threshold
6. Contraception counseling - if on phenytoin (enzyme inducer), OCP efficacy is reduced; levetiracetam does not interact with OCPs
7. Carry a seizure first-aid card; educate family on seizure first aid (lateral positioning, do not restrain, do not put anything in mouth, call ambulance if >5 min)
8. Report immediately: any skin rash, facial swelling, yellow discoloration (phenytoin hypersensitivity), or dizziness/ataxia (phenytoin toxicity)

---

• Adams and Victor's Principles of Neurology, 12th Ed. - SE treatment table, phenytoin loading
• Tintinalli's Emergency Medicine, Ch. 171 - SE algorithm, phenytoin administration
• Rosen's Emergency Medicine, Ch. 14 & 169 - AED dosing table, SE management
• Katzung's Basic & Clinical Pharmacology, 16th Ed. - phenytoin pharmacokinetics, levetiracetam SE use
• Harrison's Principles of Internal Medicine, 22nd Ed. - meningitis/encephalitis empirical treatment
• American Epilepsy Society Guidelines 2016 (Glauser T et al., Epilepsy Curr 16:48-61)
• NICE CG137 - Epilepsies: Diagnosis and Management