acyclovir vs albendazole
Side-by-side comparison of acyclovir and albendazole Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Zovirax
Albenza
Acyclovir is an antiviral medicine. It is used to treat infections caused by certain viruses.
Albendazole is a medicine that fights parasites. It is used to treat infections caused by tapeworms.
Acyclovir is used to treat shingles, which is caused by herpes zoster. It also treats genital herpes, both the first time you have it and when it comes back. Acyclovir can also treat chickenpox.
Albendazole treats infections caused by tapeworms. It is used for neurocysticercosis, which is caused by pork tapeworm larvae in the brain. It also treats hydatid disease, caused by dog tapeworm larvae in the liver, lungs, and abdomen.
Acyclovir stops the virus from growing and spreading. It does this by interfering with the virus's ability to make copies of itself. This helps your body fight off the infection.
Albendazole stops the tapeworms from growing and multiplying. It does this by blocking the worm's ability to use sugar (glucose). This eventually kills the parasite.
- • Malaise (feeling unwell)
- • Nausea
- • Diarrhea
- • Abnormal liver function tests
- • Abdominal pain
- • Nausea
- • Vomiting
- • Reversible hair loss
- Tiredness 7,612
- Diarrhea 7,064
- Using the medicine for something it's not approved for 5,797
- Lung infection 5,474
- Feeling sick to your stomach 5,330
- The medicine did not work 365
- Using the medicine for a condition it's not approved for 284
- Fever 236
- Using the product for a condition it's not approved for 224
- Headache 222
Acyclovir can cause nervous system problems, especially in older adults or people with kidney problems. Tell your doctor if you have kidney problems before taking this medicine.
Albendazole can cause bone marrow suppression, which can be fatal. Your doctor will check your blood counts before and during treatment. If your blood counts drop too low, you may need to stop taking albendazole. Albendazole can also harm an unborn baby, so women who can get pregnant should use birth control while taking it. If you are being treated for neurocysticercosis, you may experience seizures or other neurological problems. Your doctor may give you steroids and anti-seizure medicine to prevent these problems.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if acyclovir will harm an unborn baby. Talk to your doctor about the risks and benefits of taking acyclovir while breastfeeding.
Albendazole can harm an unborn baby. Women who can get pregnant should use effective birth control while taking albendazole and for one month after stopping the medicine. If you become pregnant while taking albendazole, tell your doctor right away.
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How to Read This acyclovir vs albendazole Comparison
acyclovir is classified in the Antiviral (Nucleoside Analog) drug class, while albendazole sits within the Antiparasitic (Benzimidazole) 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, acyclovir has 31,277 submissions while albendazole has 1,331. Those figures reflect cumulative reporting volume — not per-patient risk — so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. 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 acyclovir and albendazole — 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.