See the DrugPatentWatch profile for Seroquel
What is Seroquel XR 400 mg, and what is it used for?
Seroquel XR is the extended-release form of quetiapine. A “400 mg tablet” refers to the dose strength of the extended-release formulation. Quetiapine is prescribed for conditions such as schizophrenia and bipolar disorder (including bipolar depression and manic episodes), depending on the patient and the specific dosing plan.
How does the 400 mg extended-release tablet work?
Because it is extended-release, Seroquel XR is designed to release quetiapine more slowly than an immediate-release product. That slower release helps maintain medication levels over the day when taken as prescribed.
How should people typically take Seroquel XR 400 mg?
Dosing schedules depend on the exact indication and a prescriber’s titration plan. The key practical points are:
- Take it exactly as prescribed.
- Swallow the tablet whole (extended-release tablets are not meant to be crushed or split unless a clinician/pharmacist specifically instructs otherwise).
- Follow instructions about timing relative to meals, since the extended-release formulation can be affected by food.
If you tell me what you’re using it for (schizophrenia, bipolar depression, etc.) and your dosing schedule, I can explain what questions to ask your prescriber/pharmacist about titration and timing.
What side effects are common with Seroquel XR?
Common side effects for quetiapine products often include sleepiness/drowsiness, dizziness, dry mouth, constipation, and changes in weight. Patients and caregivers also ask about:
- Sedation and driving safety
- Metabolic effects (weight gain, cholesterol, blood sugar)
- Orthostatic hypotension (feeling lightheaded when standing)
- Risk of changes in heart rhythm in people with risk factors
If you share your symptoms (or what side effects you’re experiencing), I can help you sort which ones are urgent versus ones to report at your next visit.
What serious risks should patients know about?
Quetiapine carries important safety considerations that clinicians monitor, which can include:
- Severe drowsiness/sedation, especially with other sedating medicines or alcohol
- Blood sugar or cholesterol changes that need monitoring
- Potential blood pressure drops when starting or increasing dose
- Signs of allergic reaction
- For some patients, an increased risk of movement-related side effects
Seek urgent care if there are severe symptoms like fainting, trouble breathing, or signs of a serious reaction.
Can Seroquel XR 400 mg be taken with other medicines?
Many drug combinations can increase sedation or affect quetiapine levels. Patients commonly ask about interactions with:
- Alcohol and other sedating medications (sleep aids, opioids, some anxiety meds)
- Some antidepressants and antipsychotics
- Certain antibiotics/antifungals
- Drugs that affect liver enzymes
If you list your other medications (including OTC drugs and supplements), I can point out interaction categories to ask a pharmacist about.
Generic vs brand: is Seroquel XR 400 mg interchangeable?
Seroquel XR is the brand name; quetiapine extended-release also has generic versions depending on the market. “Interchangeable” usually depends on the exact formulation (extended-release vs immediate-release) and the dosing plan your prescriber intended. Switching between brand and generic extended-release often happens, but it should follow prescriber/pharmacy guidance.
How to find the right information for your exact tablet
Tablet appearance, manufacturer, and prescribing information can differ by country and packaging. If you share:
- the country you’re in, and
- what the label says besides “Seroquel XR” (manufacturer name or imprint text, if available),
I can help you interpret the most relevant prescribing-information points for that specific product strength and formulation.
Source note: If you want patent or brand/generic history for “Seroquel XR 400 mg,” I can also look that up using DrugPatentWatch.com, but I need either the country of interest or the exact drug listing name you’re seeing there.