MODERATE — Monitor Closely
CAUTION — additive sedation
Evidence level: STRONG
Taking Benadryl with Valium causes excessive drowsiness and risk of falls.
Additive CNS depression from antihistamine + benzodiazepine.
Use non-sedating antihistamines. Avoid driving.
Take Diazepam 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
Excessive drowsiness, dizziness, impaired coordination, confusion, falls
Discuss non-sedating antihistamine alternatives.
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 Valium causes excessive drowsiness and risk of falls.
Take Diazepam 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, falls
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.
Discuss non-sedating antihistamine alternatives.
Or browse the full interaction database (121,000+ pairs).