buspirone vs diltiazem
Side-by-side comparison of buspirone and diltiazem. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Buspirone : In nine healthy subjects, diltiazem significantly increased the mean buspirone AUC 5.5-fold and C max 4.1-fold compared to placebo. The T 1/2 and T max of buspirone were not significantly affected by diltiazem. Enhanced effects and increased toxicity of buspirone may be possible during concomitant administration with diltiazem.
Recommendation: Your doctor may need to lower your buspirone dose to prevent increased side effects.
Buspirone is a medicine that can help manage anxiety disorders. It can also provide short-term relief from anxiety symptoms.
Diltiazem is a medicine that helps lower high blood pressure and prevent chest pain. It belongs to a class of drugs called calcium channel blockers.
Buspirone is used to manage anxiety disorders. It can also help relieve anxiety symptoms for a short time. This medicine is often used for Generalized Anxiety Disorder (GAD), which involves constant worry and tension.
Diltiazem is used to treat high blood pressure. It can be used alone or with other blood pressure medicines. Diltiazem also helps manage chronic stable angina (chest pain) and angina caused by spasms in the heart's blood vessels.
Buspirone affects certain chemicals in your brain that may be unbalanced. This helps to reduce anxiety. It is different from other anxiety medicines like benzodiazepines.
Diltiazem works by relaxing blood vessels, which lowers blood pressure. It also reduces the heart's workload, which can prevent chest pain. This medicine blocks calcium from entering heart and blood vessel cells.
- • Dizziness
- • Nausea
- • Headache
- • Nervousness
- • Lightheadedness
- • Swelling in your ankles or feet
- • Headache
- • Dizziness
- • Slow heart rate
- • Constipation
- Tiredness 759
- Feeling sick to your stomach 744
- Head pain 675
- Worry 636
- Aches 541
- Shortness of breath 3,200
- Tiredness 2,637
- Feeling sick to your stomach 2,372
- Discomfort 2,364
- Feeling lightheaded 2,089
You should not take buspirone if you are taking a monoamine oxidase inhibitor (MAOI) antidepressant or have taken one in the past 14 days. Do not start buspirone if you are being treated with linezolid or intravenous methylene blue because of the risk of serotonin syndrome. Serotonin syndrome is a very serious condition.
Diltiazem can interact with other heart medications. Tell your doctor if you take beta-blockers or digoxin. Using diltiazem with these drugs can cause heart problems. Your doctor may need to adjust your dosages.
Tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. It is not known if buspirone will harm your unborn baby. Buspirone may pass into breast milk.
Tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. It is not known if diltiazem will harm your unborn baby. Diltiazem passes into breast milk, so talk to your doctor about breastfeeding while taking this medicine.
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How to Read This buspirone vs diltiazem Comparison
buspirone is classified in the Azapirone Anxiolytic drug class, while diltiazem sits within the Calcium Channel Blocker class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, buspirone has 3,355 submissions while diltiazem has 12,662. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to diltiazem prevents the body from breaking down buspirone properly, which causes buspirone levels to rise significantly.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between buspirone and diltiazem - always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.