cimetidine vs midazolam
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Side-by-side comparison of cimetidine and midazolam. 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
Other Drug Interactions Caution is advised when midazolam is administered concomitantly with drugs that are known to inhibit the P450-3A4 enzyme system such as cimetidine (not ranitidine), erythromycin, diltiazem, verapamil, ketoconazole and itraconazole. The effect of single oral doses of 800 mg cimetidine and 300 mg ranitidine on steady-state concentrations of midazolam was examined in a randomized crossover study (n=8). Cimetidine increased the mean midazolam steady-state concentration from 57 to 71 ng/mL.
Tagamet
Versed
Cimetidine (Tagamet) reduces stomach acid. It is used to treat ulcers, heartburn, and other conditions where too much acid is produced.
Midazolam is a medicine that makes you feel calm, relaxed, and sleepy. It can also cause you to forget things that happen while you are taking it.
Cimetidine treats active duodenal ulcers for short periods. It can also be used long-term at a lower dose to prevent ulcers from returning. This medicine also treats active benign gastric ulcers for a short time. Additionally, it can help with erosive gastroesophageal reflux disease (GERD), which damages the esophagus.
Midazolam is used to sedate you before a surgery or procedure to help you relax and feel less anxious. It can also be used to help you feel calm during procedures like bronchoscopies or endoscopies. Midazolam can also be used to start general anesthesia before you get other medicines.
Cimetidine is an H2 receptor antagonist. This means it blocks histamine from attaching to certain cells in your stomach. By blocking histamine, cimetidine reduces the amount of acid your stomach makes.
Midazolam belongs to a class of drugs called benzodiazepines. It works by slowing down activity in your brain and nervous system. This helps to reduce anxiety, promote relaxation, and cause sleepiness.
- • Headache
- • Dizziness
- • Diarrhea
- • Decreased breathing rate
- • Tenderness at the injection site
- • Pain during injection
- Chronic Kidney Disease 1,264
- Acute Kidney Injury 710
- Renal Failure 694
- Nausea 681
- Fatigue 598
- Seizure 1,373
- Hypotension 1,296
- Drug Interaction 1,088
- Toxicity To Various Agents 846
- Acute Kidney Injury 845
Reversible confusional states (like mental confusion, agitation, or hallucinations) have been reported, mostly in severely ill patients. These usually appear within 2-3 days of starting treatment and clear up within 3-4 days of stopping the drug.
Midazolam can cause serious breathing problems, including slowed or stopped breathing. This is more likely to happen if you are also taking opioid pain medicines. You must be closely monitored by trained medical staff while receiving midazolam. Make sure the facility has the equipment and medicines needed to treat breathing problems immediately.
Tell your doctor if you are pregnant or plan to become pregnant. The effects of cimetidine during pregnancy are not fully known. Talk to your doctor about the risks and benefits of taking cimetidine while breastfeeding.
Tell your doctor if you are pregnant or plan to become pregnant. Midazolam may harm an unborn baby. It is not known if midazolam passes into breast milk. Talk to your doctor about the risks and benefits of using this medicine while breastfeeding.
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How to Read This cimetidine vs midazolam Comparison
cimetidine is classified in the H2 Receptor Antagonist drug class, while midazolam sits within the Benzodiazepine class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are split between OTC and prescription status, which affects access and supervision.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, cimetidine has 3,947 submissions while midazolam has 5,448. 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 cimetidine blocks the liver enzyme that breaks down midazolam, which increases the amount of midazolam in your blood. this can make the sedative effects of the medicine much stronger.. 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 cimetidine or midazolam.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.