MODERATE — Monitor Closely
CAUTION — additive sedation, avoid if possible
Evidence level: STRONG
Taking Benadryl with Xanax causes excessive drowsiness and impaired coordination.
Additive CNS depression. Both cause sedation through different mechanisms (antihistamine + GABA enhancement).
Avoid combining. If both needed, use lowest effective doses and avoid driving/operating machinery.
Take Alprazolam only as prescribed — benzodiazepines carry dependence risk. Diphenhydramine follows its normal schedule. Benzodiazepines cause sedation — avoid combining with other sedating substances. Never increase the dose without medical guidance.
Elderly, respiratory conditions, concurrent alcohol use, other CNS depressants
Excessive drowsiness, dizziness, impaired coordination, confusion, difficulty breathing in severe cases
Ask about non-sedating antihistamines (loratadine, cetirizine) if on benzodiazepines.
Combining sedatives increases overdose risk. Discuss with your doctor: magnesium glycinate, L-theanine, or passionflower may provide anxiety relief with fewer interaction risks. Never stop benzodiazepines abruptly — taper under medical supervision.
Taking Benadryl with Xanax causes excessive drowsiness and impaired coordination.
Take Alprazolam only as prescribed — benzodiazepines carry dependence risk. Diphenhydramine follows its normal schedule. Benzodiazepines cause sedation — avoid combining with other sedating substances. Never increase the dose without medical guidance.
Excessive drowsiness, dizziness, impaired coordination, confusion, difficulty breathing in severe cases
Combining sedatives increases overdose risk. Discuss with your doctor: magnesium glycinate, L-theanine, or passionflower may provide anxiety relief with fewer interaction risks. Never stop benzodiazepines abruptly — taper under medical supervision.
Ask about non-sedating antihistamines (loratadine, cetirizine) if on benzodiazepines.
Or browse the full interaction database (121,000+ pairs).