Drug & supplement interaction

South Beach Diet + Melphalan

Melphalan brand names: Alkeran, Hepzato.

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

We found no known interaction between South Beach Diet and Melphalan 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. Additionally, although there is no interaction, the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

South Beach Diet and Melphalan

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 Melphalan and South Beach Diet in our sources. This does not guarantee that the combination is completely free of risk — research on South Beach Diet alongside specific medications may be limited.

Worth understanding: our licensed dataset holds no drug-interaction record for South Beach Diet at all — not against Melphalan, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

South Beach Diet is an eating pattern rather than something you take. Ask your pharmacist or doctor before changing how you eat while on a prescribed medicine: some medicines are dosed around meals, and a change in diet can change how they work. 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.

South Beach Diet safety at a glance

South Beach Diet overall Use caution Generally safe for healthy adults, but the strict early phase may not suit everyone.
Pregnancy Use caution Restrictive or low-carb eating is not recommended in pregnancy without medical supervision.
Breastfeeding Use caution Nursing parents need adequate calories and nutrients, so avoid restrictive phases without guidance.

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

Still wondering about combining Melphalan and South Beach Diet? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

No Interaction Found — But Data Suggests South Beach Diet and Melphalan May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so following South Beach Diet while taking the medicine can make those effects more likely to turn up, and harder to pin on one or the other if they do.

  • Stomach pain / Vomiting / Nausea Additional detail

    South Beach Diet

    “One case of hyperglycemic ketoacidosis, with symptoms of nausea, vomiting, and abdominal pain, occurred in a non-diabetic 30-year-old patient that had implemented the South Beach diet for 3 weeks.”

    South Beach Diet · Natural Medicines adverse-effect record, reported in nausea and vomiting.

    1 source cited
    1. 90101. Chalasani S, Fischer J. South Beach Diet associated ketoacidosis: a case report. J Med Case Rep 2008;2:45. PubMed

    Melphalan

    Listed in the ADVERSE REACTIONS section of the FDA label for Melphalan. Read the label on DailyMed ›

Effects for Melphalan come from the ADVERSE REACTIONS section of its FDA label; effects for South Beach Diet come from the Natural Medicines adverse-effect record, quoted above. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

Everything else you take

See Every Supplement That Interacts With Melphalan

This page covers South Beach Diet only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Melphalan page lists 25 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Acerola (moderate), Alpha-lipoic Acid (moderate), Coenzyme Q10 (moderate) and Coffee Charcoal (moderate).

By severity: 1 major · 14 moderate · 10 minor.

From our pharmacist’s overview on the Melphalan page

“Melphalan is chemotherapy, most often given for multiple myeloma, and anything that weakens it can cost real ground against the cancer, so treat this list with genuine care. The one major entry is activated charcoal, which soaks up drugs in the gut and can lower melphalan exposure even when the drug is given by IV.”

Reviewed by 2 · Jul 18, 2026

Open the Melphalan interaction page

How much people look this up

Where South Beach Diet and Melphalan 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 South Beach Diet
Steady interest

#1,295 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Melphalan
Top 25%

#358 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 South Beach Diet reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The South Beach Diet and Melphalan records this page draws on were last updated July 10, 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 .
Eating pattern

About South Beach Diet

What is South Beach Diet?

  • Weight loss
  • Blood sugar control
  • Reducing cravings for refined carbs
  • Improving cholesterol and heart health
  • General healthy eating

The South Beach Diet is a popular low-glycemic, higher-protein eating plan—not an herb or supplement. It can help some people lose weight and reduce refined-carb cravings, especially in the short term, but long-term success depends on sticking with healthy habits. Talk to your doctor or a dietitian before starting any restrictive diet, particularly if you have diabetes, kidney disease, or take medications.

Structured eating plan with three phases; books, prepackaged meals, and meal-delivery programs

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

South Beach Diet: dosing

There is no "dose" because the South Beach Diet is an eating plan, not a pill or supplement. Instead, you follow the structure of its phases and food lists as described in the official books or program materials.If you choose a prepackaged meal version, follow the program's serving guidance.

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

Read the full South Beach Diet monograph & all interactions
Medication

About Melphalan

What Is Melphalan Used For?

Brand names: Alkeran, Hepzato

Melphalan is used to treat multiple myeloma, a cancer of plasma cells in the bone marrow. Different products are approved for different roles in that treatment.

Evomela (intravenous injection) is used as a high-dose conditioning treatment — meaning it prepares the body before a stem cell transplant. Ivra (intravenous injection) is used for palliative treatment of multiple myeloma in patients for whom oral therapy is not appropriate. Oral melphalan (Alkeran tablet) is also used for palliative treatment of multiple myeloma.

See full Melphalan drug information
Keep checking

Other Drugs & South Beach Diet

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

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

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

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full South Beach Diet list.

See the full South Beach Diet interactions page
See every supplement checked against Melphalan, ranked by severity
Evidence & sources

South Beach Diet References

The 1 references that drive our South Beach Diet 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. Chalasani S, Fischer J. South Beach Diet associated ketoacidosis: a case report. J Med Case Rep 2008;2:45. 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

Following South Beach Diet While Taking Melphalan: Common Questions

Is it safe to follow South Beach Diet while taking Melphalan?
We do not list a known interaction between South Beach Diet and Melphalan. 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.
Do South Beach Diet and Melphalan have any of the same side effects?
Yes — our sources link each of them separately to 3 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
Does Melphalan interact with any supplements?
Yes. Melphalan has documented interactions with 25 supplements in our database — South Beach Diet is not one of them. The Melphalan 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

South Beach Diet monograph Uses, safety profile, and every drug interaction in one place Melphalan drug information The full plain-English guide to this medication Melphalan supplement interactions Every supplement checked against Melphalan, 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 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Melphalan and South Beach Diet?

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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.