nirmatrelvir/ritonavir vs verapamil
According to this portal's Publishing Organization, this page was last reviewed in August 2026 against our methodology. Figures and extracts on this site, including tables above 1,000 rows when the corpus is that large, are the publisher's responsibility.
Side-by-side comparison of nirmatrelvir/ritonavir and verapamil. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
moderate Known Drug Interaction
Calcium channel blockers amlodipine, diltiazem, felodipine, nicardipine, nifedipine, verapamil ↑ calcium channel blocker Caution is warranted and clinical monitoring of patients is recommended.
Paxlovid
Calan, Verelan
Paxlovid is a medicine used to treat mild to moderate COVID-19 in adults. It helps prevent severe illness, hospitalization, or death in people at high risk.
Verapamil is a drug that helps to lower blood pressure and treat chest pain (angina) and irregular heartbeats (arrhythmias). It works by relaxing blood vessels and slowing down the heart rate.
Paxlovid treats mild to moderate COVID-19 in adults. You must be at high risk of your illness becoming severe. This includes needing to go to the hospital or possibly dying from COVID-19. Paxlovid is not for preventing COVID-19 before or after exposure.
Verapamil is used to treat chest pain called angina. This includes angina that happens when you are resting or during normal activity. It is also used to control your heart rate if you have a fast or irregular heartbeat, such as atrial fibrillation or atrial flutter. Verapamil also treats high blood pressure.
Paxlovid contains two medicines, nirmatrelvir and ritonavir. Nirmatrelvir stops the virus from multiplying in your body. Ritonavir helps nirmatrelvir stay in your body longer so it can work better.
Verapamil belongs to a class of drugs called calcium channel blockers. It works by blocking calcium from entering heart and blood vessel cells. This relaxes and widens blood vessels, which lowers blood pressure and makes it easier for the heart to pump.
- • Change in taste
- • Diarrhea
- • Constipation
- • Shortness of breath
- • Dizziness
- • Slow heart rate (less than 50 beats per minute)
- • Nausea
- COVID-19 22,774
- COVID-19 coming back 20,089
- Change in taste 7,316
- Diarrhea 4,003
- Feeling sick to your stomach 2,620
- Dyspnoea 356
- Nausea 341
- Drug Interaction 316
- Dizziness 286
- Hypotension 280
Paxlovid can interact with many other medicines, causing serious or life-threatening problems. Before taking Paxlovid, tell your doctor about all the medicines you take. Your doctor may need to adjust the dose of your other medicines or monitor you more closely.
You should not take this medicine if you have severe heart problems, very low blood pressure, or certain types of irregular heartbeats without a pacemaker. Talk to your doctor if you have any of these conditions.
There is not enough information about nirmatrelvir's safety during pregnancy. Studies on ritonavir in pregnant women have not shown an increased risk of birth defects. Talk to your doctor about the risks and benefits of taking Paxlovid if you are pregnant or breastfeeding.
Tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. It is not known if verapamil will harm your unborn baby. Verapamil can pass into breast milk, so talk to your doctor about the best way to feed your baby if you take this medicine.
Also Compare, Nearby Drugs
Compare verapamil with
How to Read This nirmatrelvir/ritonavir vs verapamil Comparison
nirmatrelvir/ritonavir is classified in the Antiviral (Protease Inhibitor Combination) drug class, while verapamil 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, nirmatrelvir/ritonavir has 56,802 submissions while verapamil has 1,579. 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 moderate interaction flagged in FDA labeling, attributed to this medicine slows down the breakdown of verapamil, which can cause the drug to stay in your system longer and reach higher levels. this happens because the antiviral interferes with a specific liver enzyme.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for nirmatrelvir/ritonavir or verapamil.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.