Carbinoxamine and Quetiapine interaction
Carbinoxamine and Quetiapine: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Carbinoxamine (Carbinoxamine Maleate Extended-Release Oral Suspension) label · effective 2026-03-12
Avoid concurrent use of Carbinoxamine Maleate Extended-Release Oral Suspension with alcohol or other central nervous system depressants because additional impairment of central nervous system performance may occur.
Avoid use of Carbinoxamine Maleate extended-release oral suspension with alcohol and other CNS depressants (hypnotics sedatives, tranquilizers, etc.) due to additive effects.
(4 and 7) Alcohol and CNS depressants (hypnotics sedatives, tranquilizers, etc.): Avoid concomitant use due to additive adverse effects.
From the Quetiapine (SEROQUEL XR) label · effective 2026-04-10
• Anticholinergic (antimuscarinic) Effects: Use with caution with other anticholinergic drugs and in patients with urinary retention, prostatic hypertrophy, or constipation (5.20)
Other important considerations in the differential diagnosis include central anticholinergic toxicity, heat stroke, drug fever, and primary central nervous system (CNS) pathology.
This contributes to anticholinergic adverse reactions when SEROQUEL XR is used at therapeutic doses, taken concomitantly with other anticholinergic medications, or taken in overdose.
SEROQUEL XR should be used with caution in patients receiving medications having anticholinergic (antimuscarinic) effects [see Drug Interactions (7.1) , Overdosage (10.1) , and Clinical Pharmacology (12.1) ] .
Anticholinergic Drugs: Concomitant treatment with quetiapine and other drugs with anticholinergic activity can increase the risk for severe gastrointestinal adverse reactions related to hypomotility.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.