Most people who take albendazole swallow one or two tablets and never think about it again. For them, drug interactions are a small footnote. But albendazole is also used for weeks or months at a time to treat cysts in the brain, liver and lungs, and during those long courses it shares the liver with steroids, seizure medicines, acid reducers and whatever else is in the medicine cabinet. That is where interactions start to matter.
This guide groups albendazole drug interactions by what they actually do: some medicines push albendazole levels up, some pull them down, a few are affected by albendazole itself, and others stack similar side effects on the liver or bone marrow. Foods and supplements get their own section, followed by a checklist you can take to your pharmacist.
Short answer: The best-documented albendazole interactions involve dexamethasone, praziquantel and cimetidine (which raise levels), enzyme-inducing seizure medicines such as phenytoin, carbamazepine and phenobarbital (which can lower levels), and theophylline (whose levels albendazole may change). Grapefruit and fatty meals also raise absorption. For a single deworming dose these rarely matter; for long courses, your prescriber should review every medicine and supplement you take.
Why Albendazole Interactions Happen: A Quick Tour of the Drug’s Journey
Interactions make more sense once you know the route albendazole takes through the body. There are three stops where another substance can interfere.
Stop 1: The gut
Albendazole dissolves poorly in water, so only a small fraction of a dose is absorbed on an empty stomach. Fat helps it dissolve. The US prescribing information reports that a fatty meal raised blood levels of the active form by up to about five times compared with fasting. That is why food, and especially fat, behaves like an “interaction” even though it is not a drug. We cover this in depth in our guide to taking albendazole with food.
Stop 2: The liver
Once absorbed, albendazole is converted almost immediately in the liver into albendazole sulfoxide, the form that does most of the work against parasites living in tissue. That conversion, and the later breakdown of the sulfoxide, relies on liver enzyme systems, including cytochrome P450 enzymes. Any medicine that speeds up or slows down those enzymes can change how much active drug reaches the parasite.
Stop 3: The bile
Very little albendazole leaves through the kidneys. Most of it is cleared through bile. People with blocked bile ducts, or medicines that affect bile handling, can end up with much higher exposure. The label notes that in patients with extrahepatic biliary obstruction, peak levels roughly doubled and total exposure rose about sevenfold.
The Interaction Map at a Glance
Before the detail, here is the whole picture in one table. The direction column tells you what happens to albendazole (or the other drug), which is more useful than a generic “avoid” label.
| Substance | Direction | What it means in practice |
|---|---|---|
| Dexamethasone and other corticosteroids | Albendazole levels go up | Usually intentional in neurocysticercosis; your prescriber plans around it |
| Praziquantel | Albendazole levels go up | Combination is deliberately used for some cyst infections |
| Cimetidine | More drug reaches bile and cyst fluid | Sometimes used on purpose in hydatid disease |
| Grapefruit juice | Albendazole levels may go up | Keep intake consistent or avoid during long courses |
| Phenytoin, carbamazepine, phenobarbital | Albendazole levels may go down sharply | Important in brain cyst treatment; dose or drug choice may change |
| Rifampin and similar enzyme inducers | Albendazole levels may go down | Prescriber review needed |
| Some HIV medicines (e.g., ritonavir-boosted regimens) | Levels may change | Specialist review needed |
| Theophylline | Theophylline levels may change | Blood levels monitored during and after treatment |
| Drugs that suppress bone marrow | Overlapping side effects | More frequent blood counts |
| Drugs or substances that stress the liver | Overlapping side effects | More attention to liver tests |
| Fatty meals | Absorption goes up | Helpful for tissue infections; follow your prescriber’s food advice |
Group 1: Medicines That Raise Albendazole Levels
Here is something that surprises many people: several “level-raising” interactions are used on purpose. When a parasite lives in brain tissue or inside a fluid-filled cyst, more drug exposure can be an advantage. The key is that a prescriber chooses the combination knowingly and monitors for it.
Dexamethasone and other corticosteroids
Steroids are routinely given alongside albendazole in neurocysticercosis, where dying cysts in the brain trigger inflammation and swelling. According to the US label, steady-state trough levels of albendazole sulfoxide were about 56% higher when dexamethasone was given with each albendazole dose. That boost is generally welcomed, but it also means side effects tied to drug exposure, such as liver enzyme changes, deserve closer attention during combined treatment.
If you are on a steroid for another reason, such as asthma, arthritis or an autoimmune condition, tell the prescriber. Steroids can also unmask a hidden Strongyloides infection, which is a separate safety issue covered in our comparison of albendazole and ivermectin.
Praziquantel
Praziquantel is another anti-parasitic drug, often used for flukes and adult tapeworms. When taken together with albendazole, it raises albendazole sulfoxide levels by roughly half, according to the prescribing information. Expert guidelines for neurocysticercosis actually recommend combining albendazole with praziquantel when a person has more than two viable brain cysts, so this interaction is part of the treatment design rather than something to avoid. We explain those treatment pathways in our neurocysticercosis guide.
Cimetidine
Cimetidine is an older acid-reducing medicine. In people with hydatid cysts, adding cimetidine roughly doubled albendazole sulfoxide concentrations in bile and cyst fluid. Some specialists have used this effect deliberately. If you take cimetidine for heartburn on your own, mention it, because it changes exposure in a way your prescriber should know about. Other acid reducers such as famotidine or omeprazole have not shown the same documented effect in the label, but always list them anyway.
Grapefruit juice
Grapefruit juice blocks certain gut enzymes and has been reported to increase albendazole sulfoxide levels. For a single dose, the practical impact is small. During a long course, the safer approach is to avoid grapefruit or keep intake steady so blood levels don’t swing from day to day.
Group 2: Medicines That Lower Albendazole Levels
This group can quietly undermine treatment. If the active drug never reaches an effective level, cysts may not respond, and the person may not realize anything is wrong until a follow-up scan.
Enzyme-inducing seizure medicines
Phenytoin, carbamazepine and phenobarbital switch on liver enzymes that break down many drugs. Reviews cite reductions in albendazole levels of up to about 50% with these medicines. This matters enormously because seizures are the most common way neurocysticercosis shows up, so many people on albendazole for brain cysts are also on a seizure medicine.
Prescribers handle this in a few ways: choosing a seizure medicine that does not induce liver enzymes, adjusting the albendazole plan, or monitoring the response more closely with imaging. The decision belongs to the neurology or infectious-disease team. Never stop or swap a seizure medicine on your own because of an interaction concern. Stopping suddenly can trigger seizures.
Rifampin, rifabutin and other strong inducers
Rifampin, used for tuberculosis and some other infections, is one of the strongest enzyme inducers in medicine. It can lower albendazole levels in the same way. This combination comes up more often than you might expect, because some people from regions where tuberculosis is common also need treatment for parasites.
HIV medicines
Antiretroviral regimens, especially those boosted with ritonavir or containing efavirenz, can affect enzyme activity in both directions. Studies have reported lower albendazole levels with ritonavir. If you take HIV medicine, your HIV specialist or pharmacist should review any albendazole prescription.
St John’s wort
This herbal remedy for low mood is a well-known enzyme inducer. While specific albendazole studies are limited, the mechanism is the same one that lowers levels of many other drugs. Pause and ask before combining it with a long albendazole course.
Group 3: Medicines Albendazole Itself May Affect
Theophylline
Albendazole can induce a liver enzyme (CYP1A2) that clears theophylline, a breathing medicine used for asthma and COPD. Theophylline has a narrow safe range: too little and breathing control slips, too much and it can cause a racing heart, vomiting or seizures. The US label recommends monitoring theophylline blood levels during and after albendazole treatment.
Other medicines that rely heavily on CYP1A2, such as some antipsychotics, have less direct evidence, but it is reasonable to mention them. If you want to see how a strong CYP1A2 blocker works the other way, our article on Luvox drug interactions explains the same enzyme from a different angle.
Group 4: Combinations That Stack Side Effects
Some combinations don’t change albendazole levels at all. They simply ask the same organ to absorb two hits at once. The two organs to think about are the liver and the bone marrow. For the full picture on these effects, see our albendazole side effects guide.
Bone marrow: medicines that can lower blood counts
Albendazole can, uncommonly, suppress the bone marrow and lower white cell counts. Rare cases of severe marrow failure have been reported, most often with long courses and in people with liver disease. Risk climbs when albendazole is combined with other marrow-suppressing medicines, such as:
- Methotrexate, azathioprine and mycophenolate
- Cancer chemotherapy, especially recent or ongoing
- Clozapine
- Carbamazepine (which also falls into Group 2)
- Some antibiotics used long term, such as trimethoprim-sulfamethoxazole at high doses
This doesn’t automatically rule out albendazole. It usually means blood counts are checked more often.
Liver: medicines and substances that stress liver cells
Mild liver enzyme rises are among the most common lab changes during longer albendazole courses. Adding other liver stressors raises the chance that those rises become meaningful. Common examples include:
- High or frequent doses of acetaminophen (paracetamol)
- Isoniazid and some other tuberculosis drugs
- Valproate
- Oral antifungals such as ketoconazole
- Regular alcohol use (see our albendazole and alcohol article)
A note about other dewormers
You may have seen a serious warning about combining a dewormer with metronidazole. That warning belongs to mebendazole, whose label describes rare severe skin reactions when the two are used together. Albendazole carries no matching label warning, but because the two drugs are close relatives, many clinicians are cautious about combining any benzimidazole with metronidazole without a clear reason. Our albendazole vs mebendazole guide compares the two drugs in detail.
Foods, Drinks and Supplements: What to Know
Interactions don’t stop at prescriptions. The table below covers everyday items people ask about most.
| Item | Effect on albendazole | Practical tip |
|---|---|---|
| Fatty meal (eggs, cheese, nuts, ghee, whole milk) | Raises absorption up to about 5-fold | Usually recommended for tissue infections; follow your prescriber’s instructions |
| Grapefruit and grapefruit juice | May raise levels | Avoid or keep steady during long courses |
| Alcohol | No known direct chemical reaction, but adds liver strain | Avoid during long courses and while liver tests are being monitored |
| Coffee and tea | No meaningful interaction known | Fine in usual amounts |
| St John’s wort | May lower levels | Ask before using |
| Green tea extract, kava, high-dose niacin, some bodybuilding products | Possible added liver stress | Pause during long courses unless your doctor agrees |
| Iron, multivitamins, zinc | No known interaction | Often helpful after hookworm-related anemia, if prescribed |
| Probiotics | No known interaction | Generally fine |
| “Natural” parasite cleanses | Unknown ingredients; some are liver-toxic | Don’t combine with albendazole; they are not a substitute |
Single Dose vs Long Course: When Interactions Really Matter
The same drug can carry very different interaction risk depending on how it is used. This comparison helps you judge how much attention your situation needs.
| Factor | One or two doses (e.g., roundworm, pinworm) | Long course (e.g., brain or liver cysts) |
|---|---|---|
| Typical duration | 1 day, sometimes repeated after 2 weeks | 8–30 days, sometimes repeated cycles over months |
| Where the drug needs to work | Mostly inside the gut | Inside tissue and cysts |
| Impact of level-raising drugs | Minor | Can be meaningful; sometimes intended |
| Impact of level-lowering drugs | Minor | Can cause treatment failure |
| Lab monitoring | Usually none | Blood counts and liver tests on a schedule |
| Who should review your medicine list | Pharmacist at pickup | Prescriber, pharmacist and, if relevant, your neurologist or HIV specialist |
For dose details by condition, see our albendazole dosage guide. For how long the drug lingers after your last tablet, which matters when starting a new medicine, see how long albendazole stays in your system.
Special Situations Worth Flagging
If you are being treated for brain cysts
Neurocysticercosis treatment often involves three or four medicines at once: albendazole, sometimes praziquantel, a steroid, and a seizure medicine. Every one of these interacts with at least one of the others. That is normal and expected, but it is also why this treatment is usually directed by a specialist rather than handled casually. Keep one up-to-date medicine list and bring it to every appointment.
If you have liver disease
The liver both activates and clears albendazole. Cirrhosis, hepatitis or a blocked bile duct can change drug levels and also raise the risk of bone marrow side effects. Your prescriber may adjust monitoring or the treatment plan.
If you are pregnant or could become pregnant
This is not a drug interaction in the classic sense, but it is a key safety check. Albendazole can harm a developing baby, so a pregnancy test is usually required before longer courses. Read our albendazole in pregnancy guide for the details.
If you take blood thinners
No strong, well-documented interaction exists between albendazole and warfarin. However, any new medicine, illness or change in diet can shift warfarin control, so an extra INR check during a long course is a sensible precaution to discuss.
Your 10-Point Albendazole Interaction Checklist
- Write down every prescription medicine you take, including inhalers, injections and patches.
- Add over-the-counter products, especially acid reducers, painkillers and sleep aids.
- List every supplement, herbal product and “detox” or “cleanse” product.
- Note whether you are on a seizure medicine, and which one.
- Note any steroid use in the past month, even short courses.
- Mention tuberculosis treatment, HIV treatment or chemotherapy, past or present.
- Tell your prescriber about liver disease, gallbladder problems or past abnormal blood counts.
- Ask whether your course length means you need blood tests, and when.
- Ask whether to take albendazole with food, and what kind of food.
- Check before starting any new medicine during the course and for a few days afterward.
Questions to Ask Your Pharmacist
- Does anything on my list raise or lower albendazole levels?
- Does albendazole change the level of anything I already take?
- Do any of my medicines also affect the liver or blood counts?
- Should I avoid grapefruit or alcohol during this course?
- If I get a headache during treatment, which painkiller is safest for me?
Frequently Asked Questions
Can I take paracetamol (acetaminophen) or ibuprofen with albendazole?
For most people, normal doses of either are acceptable during a short course. During long courses with liver monitoring, prescribers often prefer you to keep acetaminophen to modest doses, and people with kidney or stomach issues may need to limit ibuprofen. Ask which suits you.
Can I take albendazole with antibiotics?
Most common antibiotics, such as amoxicillin or azithromycin, have no known meaningful interaction. Rifampin is the notable exception because it can lower albendazole levels. Discuss metronidazole with your prescriber before combining.
Is it safe to take albendazole with antacids?
Ordinary antacids are not known to cause a significant problem. Cimetidine is the acid reducer with a documented effect on albendazole, and it increases rather than decreases exposure in bile and cysts.
Does albendazole interact with birth control pills?
No meaningful effect on hormonal contraception has been documented. Contraception is in fact recommended during longer courses because of pregnancy risk.
Can I take albendazole if I’m on antidepressants?
Common antidepressants are not known to interact strongly with albendazole. Fluvoxamine affects CYP1A2 and some antidepressants affect the liver in rare cases, so it’s still worth a pharmacist check, especially for long courses. Our Prozac drug interactions guide shows how SSRIs interact with other medicines more broadly.
What happens if I took albendazole with something on this list by accident?
For a single dose, there is usually nothing to do beyond telling your pharmacist. For long courses, contact your prescriber so they can decide whether levels, blood tests or the plan need adjusting. Seek urgent care for severe symptoms such as yellowing skin, high fever with sore throat, confusion or a seizure.
The Bottom Line
Albendazole drug interactions follow a logical pattern. Steroids, praziquantel, cimetidine, grapefruit and fat push levels up. Enzyme-inducing seizure drugs, rifampin and some HIV medicines can pull them down. Theophylline levels may shift because of albendazole. Bone-marrow and liver stressors add to side effects. For a one-off deworming tablet, these rarely change anything. For long courses, a full medicine review at the start is one of the simplest ways to make treatment both safer and more effective.
Sources and Further Reading
- DailyMed: albendazole tablet prescribing information
- MedlinePlus: Albendazole
- StatPearls: Albendazole (NCBI Bookshelf)
- IDSA/ASTMH 2017 Guidelines for Neurocysticercosis
- FDA MedWatch: report a side effect
This article is for general education and does not replace advice from your doctor or pharmacist. Do not start, stop or change any medicine without professional guidance.
