Side Effects of Lamictal (Lamotrigine) and Abilify (Aripiprazole)
Both medications carry distinct side effect profiles that require careful monitoring, with lamotrigine's most serious risk being life-threatening rash (Stevens-Johnson syndrome) and aripiprazole's most concerning effects being metabolic disturbances and movement disorders.
Lamictal (Lamotrigine) Side Effects
Most Serious - Requires Immediate Action
- Life-threatening rash (Stevens-Johnson syndrome): Incidence of 10-17% for any rash, with serious reactions being rare but potentially fatal 1. Stop the medication immediately if any rash develops 2
- Risk may be significantly increased when combined with aripiprazole - two cases of Stevens-Johnson syndrome occurred in just three patients taking this combination 3
- Aseptic meningitis (rare but serious) 2
Common Side Effects (≥4% incidence)
- Neurological: Dizziness, ataxia, diplopia (double vision), tremor, headache, somnolence 1, 2
- Gastrointestinal: Nausea, vomiting 2
- Blurred vision, runny nose 2
Important Warnings
- Cardiac effects: Can cause heart rhythm problems, especially in those with pre-existing heart conditions 2
- Mood destabilization: Can induce manic episodes, particularly in bipolar I disorder patients with manic predominant polarity or history of antidepressant-induced mania 4
- Drug interactions: Effectiveness reduced by oral contraceptives; stopping birth control while on lamotrigine can cause side effects 2
Abilify (Aripiprazole) Side Effects
Most Serious - Life-Threatening
- Neuroleptic malignant syndrome (NMS): High fever, stiff muscles, confusion, sweating, changes in vital signs - can lead to death 5. Risk increased when combined with lamotrigine and other medications 6
- Stroke risk in elderly patients with dementia-related psychosis 5
Common Side Effects in Adults
- Neurological: Dizziness, headache, blurred vision, inner restlessness (akathisia - affects ~18% of patients) 5, 7
- Gastrointestinal: Nausea, vomiting, constipation 5
- Psychiatric: Anxiety, insomnia, restlessness 5
- Upper respiratory illness 5
Common Side Effects in Children
- Feeling sleepy, headache, vomiting, fatigue 5
- Appetite changes, increased salivation 5
- Weight gain, uncontrolled movements 5
Metabolic and Endocrine Problems
- High blood sugar and diabetes: Can lead to coma or death if severe 5
- Increased cholesterol and triglycerides 5
- Weight gain - requires regular monitoring 5
- Generally lower metabolic risk compared to olanzapine or clozapine 7
Movement Disorders
- Tardive dyskinesia: Uncontrolled movements that may be permanent even after stopping the drug 5
- Extrapyramidal symptoms: Occurred in up to 28% of patients, though lower than with typical antipsychotics like haloperidol 7
Other Significant Effects
- Orthostatic hypotension: Lightheadedness when standing, increased fall risk 5
- Unusual urges: Compulsive gambling, binge eating, compulsive shopping, increased sexual urges 5
- Low white blood cell count, seizures 5
- Difficulty swallowing (aspiration risk) 5
Critical Combination Warnings
When lamotrigine and aripiprazole are used together:
- Dramatically increased risk of Stevens-Johnson syndrome 3
- Severe akathisia, anxiety, and suicidal ideation reported in multiple cases 8
- Increased NMS risk, especially with other medications or organic disorders 6
Start aripiprazole at low doses and monitor closely for akathisia, increased anxiety, or suicidal thoughts when combining with lamotrigine 8. These limiting side effects require immediate discontinuation.
Monitoring Requirements
For Lamotrigine
- Watch for any rash development - stop immediately if occurs 2
- Monitor for mood changes, especially manic symptoms 4
- Check for coordination problems, vision changes 2
For Aripiprazole
- Before starting: BMI, waist circumference, blood pressure, HbA1c, glucose, lipids, prolactin, liver function, renal function, CBC, ECG 9
- Ongoing: Fasting glucose at 4 weeks, then regular metabolic monitoring 9
- Watch for movement disorders, especially akathisia 5
- Monitor for signs of NMS (fever, muscle rigidity, confusion) 5