Drug & supplement interaction

Forsythia + Ceftolozane Sulfate, Tazobactam Sodium

Ceftolozane Sulfate, Tazobactam Sodium brand name: Zerbaxa.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Forsythia and Ceftolozane Sulfate, Tazobactam Sodium in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first.

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Interaction report

Forsythia and Ceftolozane Sulfate, Tazobactam Sodium

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Ceftolozane Sulfate, Tazobactam Sodium and Forsythia in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Forsythia safety at a glance

Forsythia overall Use caution Generally used short-term in traditional medicine, but human safety data are limited.
Pregnancy Avoid Not enough safety data; avoid during pregnancy.
Breastfeeding Avoid Not enough safety data; best avoided while breastfeeding.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Ceftolozane Sulfate, Tazobactam Sodium and Forsythia? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Ceftolozane Sulfate, Tazobactam Sodium

Interactions in our licensed database are recorded against drug classes, not just single drug names. Ceftolozane Sulfate, Tazobactam Sodium is filed under a single classification — antibiotic drugs. Forsythia has documented interactions with 2 drug classes — the most serious being anticoagulant/antiplatelet drugs (moderate) and azithromycin (zithromax) (minor) — and none of Ceftolozane Sulfate, Tazobactam Sodium’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Forsythia Does Interact With Other Medications

Forsythia has 122 moderate, 1 minor known drug interactions in our database — Ceftolozane Sulfate, Tazobactam Sodium isn’t one of them. If you take anything else, check it against the full list below.

Moderate 122 Minor 1 No known interaction 2,707 (incl. Ceftolozane Sulfate, Tazobactam Sodium)
Taking anything else?

Check Another of Your Medications Against Forsythia

Covers the 2,830 medications we’ve checked against Forsythia. Pick one to open its full report.

What to actually watch for

What Ceftolozane Sulfate, Tazobactam Sodium’s Own FDA Label Lists

This is not an interaction — none of it involves Forsythia. These are the most notable effects listed in the ADVERSE REACTIONS section of Ceftolozane Sulfate, Tazobactam Sodium’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 10 of them are worth acting on rather than waiting out — marked below.

  • Low magnesium Worth acting on
  • A stroke or mini-stroke Worth acting on
  • A bowel blockage Worth acting on
  • Low potassium Worth acting on
  • Blood clots Worth acting on
  • High blood sugar Worth acting on
  • An irregular heartbeat Worth acting on
  • Chest pain Worth acting on
  • Kidney problems Worth acting on
  • Anemia Worth acting on

Showing the 10 most notable of 33 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Ceftolozane Sulfate, Tazobactam Sodium. Read the label on DailyMed › Forsythia’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Forsythia side to compare — that is a limit of the record, not a statement that Forsythia has no side effects.

Everything else you take

See Every Supplement That Interacts With Ceftolozane Sulfate, Tazobactam Sodium

This page covers Forsythia only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Ceftolozane Sulfate, Tazobactam Sodium page lists 27 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Bacillus Coagulans (moderate), Bacillus Subtilis (moderate), Bifidobacterium Animalis Subsp. Lactis (moderate), Bifidobacterium Bifidum (moderate) and Bifidobacterium Breve (moderate).

By severity: 26 moderate · 1 minor.

From our pharmacist’s overview on the Ceftolozane Sulfate, Tazobactam Sodium page

“The supplement interactions on file for Zerbaxa (ceftolozane and tazobactam) all point in one direction, and it is not toward harming you. Every entry is a probiotic or fermented product, things like Lactobacillus acidophilus or fermented milk drinks, and the concern is that this potent antibiotic can kill the live organisms in those p…”

Reviewed by 2 · Jul 18, 2026

Open the Ceftolozane Sulfate, Tazobactam Sodium interaction page

One more smart check

Taking Forsythia as Part of a Dietary Supplement Product? Check It for Interactions

We hold 355 real supplement products containing Forsythia, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Forsythia. Even though Forsythia itself has no known interaction with Ceftolozane Sulfate, Tazobactam Sodium, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Forsythia and Ceftolozane Sulfate, Tazobactam Sodium Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Forsythia
Top 25%

#338 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Ceftolozane Sulfate, Tazobactam Sodium
Top 25%

#348 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Forsythia reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Forsythia and Ceftolozane Sulfate, Tazobactam Sodium records this page draws on were last updated June 20, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Forsythia

What is Forsythia?

  • Colds and flu symptoms
  • Sore throat
  • Fever
  • Inflammation
  • Antimicrobial support

Forsythia is a traditional Chinese herb, used mainly for cold and flu symptoms and as part of multi-herb formulas. Most evidence comes from laboratory, animal, and traditional use rather than strong human studies, so its real-world benefits remain unproven. Talk to your pharmacist or doctor before using it, especially if you are pregnant, breastfeeding, or taking other medicines.

Forsythia suspensa · Oleaceae · Dried fruit (and sometimes leaves) · Dried fruit, teas, decoctions, capsules, and herbal formulas

An interaction check asks whether these two react with each other — it does not ask whether Forsythia is a good idea for someone in your situation. Here is what our Forsythia record says about it on its own.

Forsythia: dosing

There is no well-established standardized dose for forsythia. Traditional preparations use the dried fruit in decoctions, often as part of a multi-herb formula, and amounts vary by product and practitioner.If you use a commercial supplement, follow the directions on the product label and do not exceed the recommended amount.

From our Forsythia monograph — the full record covers uses, side effects and every documented interaction.

Read the full Forsythia monograph & all interactions
Medication

About Ceftolozane and Tazobactam Injection

What Is Ceftolozane and Tazobactam Injection Used For?

Brand name: Zerbaxa

Zerbaxa (ceftolozane and tazobactam) is used to treat three types of serious bacterial infections in adults and children born at least 32 weeks gestational age. For complicated intra-abdominal infections (serious infections inside the belly), Zerbaxa is always given alongside another antibiotic called metronidazole. It also treats complicated urinary tract infections, including kidney infections (pyelonephritis).

Zerbaxa is also approved to treat hospital-acquired bacterial pneumonia and ventilator-associated bacterial pneumonia — lung infections that develop in the hospital or while a patient is on a breathing machine. It works only against specific bacteria confirmed or strongly suspected to be causing the infection.

See full Ceftolozane and Tazobactam Injection drug information
Keep checking

Other Drugs & Forsythia

Browse every other medication we’ve checked against Forsythia — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
122Moderate
1Minor
2,706No known interaction
122 Moderate 1 Minor 2,706 No interaction
Moderate

122 interactions

Showing 60 of 122 moderate interactions — see all 122 on the Forsythia page.

Minor

1 interaction

No interaction 2,706 drugs checked — show the list

We also checked Forsythia against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,706 medications checked with no known interaction — see the full Forsythia list.

See the full Forsythia interactions page
See every supplement checked against Ceftolozane Sulfate, Tazobactam Sodium, ranked by severity
Evidence & sources

Forsythia References

The 3 references that drive our Forsythia monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Kong XT, Fang HT, Jiang GQ, et al. Treatment of acute bronchiolitis with Chinese herbs. Arch Dis Child 1993;68:468-71. PubMed
  2. Iwakami S, Wu JB, Ebizuka Y, Sankawa U. Platelet activating factor (PAF) antagonists contained in medicinal plants: lignans and sesquiterpenes. Chem Pharm Bull (Tokyo) 1992;40:1196-8. PubMed
  3. Li XG, Ni J, Shen S, Wang XP, Tian JC. Pharmacokinetic interaction of Forsythia suspensa extract and azithromycin injection after single and co-intravenous administration in rats. Chin J Nat Med 2020;18(3):234-240. PubMed

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Forsythia and Ceftolozane Sulfate, Tazobactam Sodium Together: Common Questions

Is it safe to take Forsythia with Ceftolozane Sulfate, Tazobactam Sodium?
We do not list a known interaction between Forsythia and Ceftolozane Sulfate, Tazobactam Sodium. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
How was the Forsythia and Ceftolozane Sulfate, Tazobactam Sodium combination checked?
Interactions in our licensed database are recorded against drug classes. Ceftolozane Sulfate, Tazobactam Sodium is filed under 1 classification, and Forsythia has documented interactions with 2 drug classes — none of Ceftolozane Sulfate, Tazobactam Sodium's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Forsythia interact with any other medications?
Yes. Forsythia has 123 documented drug interactions in our database — Ceftolozane Sulfate, Tazobactam Sodium is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Ceftolozane Sulfate, Tazobactam Sodium interact with any supplements?
Yes. Ceftolozane Sulfate, Tazobactam Sodium has documented interactions with 27 supplements in our database — Forsythia is not one of them. The Ceftolozane Sulfate, Tazobactam Sodium interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

Keep Exploring

Forsythia monograph Uses, safety profile, and every drug interaction in one place Ceftolozane and Tazobactam Injection drug information The full plain-English guide to this medication Ceftolozane Sulfate, Tazobactam Sodium supplement interactions Every supplement checked against Ceftolozane Sulfate, Tazobactam Sodium, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 3 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Ceftolozane Sulfate, Tazobactam Sodium and Forsythia?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.