Drug & supplement interaction

Ketogenic Diet + Riociguat

Riociguat brand name: Adempas.

No Known Interaction
The bottom line No known interaction

We found no known interaction between Ketogenic Diet and Riociguat 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

Ketogenic Diet and Riociguat

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

Ketogenic 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.

Ketogenic Diet safety at a glance

Ketogenic Diet overall Use caution Generally manageable for healthy adults short-term, but it can cause side effects and is not safe for everyone.
Pregnancy Use caution Strict keto is generally not recommended in pregnancy without medical supervision because of nutrient and growth concerns.
Breastfeeding Possibly Unsafe When used orally without medical supervision. While rare, there are several case reports of lactation ketoacidosis thought to be associated with adherence to ca... Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Riociguat and Ketogenic Diet? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Riociguat

Interactions in our licensed database are recorded against drug classes, not just single drug names. Riociguat is filed under 4 classifications — including antihypertensive drugs, p-glycoprotein substrates, cytochrome p450 3a4 (cyp3a4) substrates. Ketogenic Diet has documented interactions with 6 drug classes — the most serious being anticonvulsants (moderate), antidiabetes drugs (moderate) and carbonic anhydrase inhibitors (moderate) — and none of Riociguat’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

Ketogenic Diet Does Interact With Other Medications

Ketogenic Diet has 137 moderate, 122 minor known drug interactions in our database — Riociguat isn’t one of them. If you take anything else, check it against the full list below.

Taking anything else?

Check Another of Your Medications Against Ketogenic Diet

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

What to actually watch for

No Interaction Found — But Data Suggests Ketogenic Diet and Riociguat 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 Ketogenic 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. 2 of them are worth acting on rather than waiting out — marked below.

  • Anemia Worth acting on Additional detail

    Ketogenic Diet

    “Hyperuricemia is a common mild and transient adverse effect related to a very low-calorie ketogenic diet in obese adults. It has also been reported with high-fat ketogenic diets in children with epilepsy and a few patients with cancer.

    In a case report, hyponatremia thought to be related to the ketogenic diet occurred in an adult given the diet for super-refractory status epilepticus.”

    Ketogenic Diet · Natural Medicines adverse-effect record, reported in anemia.

    6 sources cited
    1. 96957. Martin-McGill KJ, Srikandarajah N, Marson AG, Tudur Smith C, Jenkinson MD. The role of ketogenic diets in the therapeutic management of adult and paediatric gliomas: a systematic review. CNS Oncol. 2018;7(2):CNS17.
    2. 96970. Zahra A, Fath MA, Opat E, et al. Consuming a ketogenic diet while receiving radiation and chemotherapy for locally advanced lung cancer and pancreatic cancer: The University of Iowa experience of two phase 1 clinical trials. Radiat Res. 2017;187(6):743-75 PubMed
    3. 96978. Winter SF, Loebel F, Dietrich J. Role of ketogenic metabolic therapy in malignant glioma: A systematic review. Crit Rev Oncol Hematol. 2017;112:41-58. PubMed
    4. 97650. Cai QY, Zhou ZJ, Luo R, et al. Safety and tolerability of the ketogenic diet used for the treatment of refractory childhood epilepsy: a systematic review of published prospective studies. World J Pediatr. 2017;13(6):528-536. PubMed
    5. 98415. Cervenka MC, Hocker S, Koenig M, et al. Phase I/II multicenter ketogenic diet study for adult superrefractory status epilepticus. Neurology. 2017;88(10):938-943. PubMed
    6. 100843. Chin A. Copper Deficiency Anemia and Neutropenia Due to Ketogenic Diet. Pediatrics. 2018;141(5). pii: e20173286. PubMed

    Riociguat

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

  • Bleeding or bruising Worth acting on Additional detail

    Ketogenic Diet

    “The ketogenic diet is generally well tolerated when followed for up to one year. Ketogenic diets have poor long-term tolerability and are usually not sustainable long-term.

    Most Common Adverse Effects:

    Dizziness, fatigue, headache, gastrointestinal discomfort, nausea, and weakness; these symptoms are sometimes referred to as the "keto flu".”

    Ketogenic Diet · Natural Medicines adverse-effect record, reported in arrhythmia.

    Riociguat

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

  • Heartburn / Swelling / Diarrhea Additional detail

    Ketogenic Diet

    “The most common adverse effect of the ketogenic diet is constipation, possibly requiring medication. Severe fecal impaction with a large stool bezoar that required a right hemicolectomy has been reported in a 6-week-old infant on ketogenic formula for refractory epilepsy. Other common mild adverse effects include vomiting, nausea, diarrhea, hunger, reflux, gas, and abdominal discomfort.”

    Ketogenic Diet · Natural Medicines adverse-effect record, reported in constipation.

    6 sources cited
    1. 98415. Cervenka MC, Hocker S, Koenig M, et al. Phase I/II multicenter ketogenic diet study for adult superrefractory status epilepticus. Neurology. 2017;88(10):938-943. PubMed
    2. 98417. Kossoff EH, Zupec-Kania BA, Auvin S, et al. Optimal clinical management of children receiving dietary therapies for epilepsy: Updated recommendations of the International Ketogenic Diet Study Group. Epilepsia Open. 2018;3(2):175-192. PubMed
    3. 96903. Liu H, Yang Y, Wang Y, et al. Ketogenic diet for treatment of intractable epilepsy in adults: A meta-analysis of observational studies. Epilepsia Open. 2018;3(1):9-17. PubMed
    4. 96957. Martin-McGill KJ, Srikandarajah N, Marson AG, Tudur Smith C, Jenkinson MD. The role of ketogenic diets in the therapeutic management of adult and paediatric gliomas: a systematic review. CNS Oncol. 2018;7(2):CNS17.
    5. 96978. Winter SF, Loebel F, Dietrich J. Role of ketogenic metabolic therapy in malignant glioma: A systematic review. Crit Rev Oncol Hematol. 2017;112:41-58. PubMed
    6. 97639. Ashrafi MR, Hosseini SA, Zamani GR, et al. The efficacy of the ketogenic diet in infants and young children with refractory epilepsies using a formula-based powder. Acta Neurol Belg. 2017;117(1):175-182. PubMed

    Riociguat

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

  • Bloating or gas / Dizziness Additional detail

    Ketogenic Diet

    Recorded for Ketogenic Diet in the same Natural Medicines adverse-effect record shown under Bleeding or bruising above.

    Riociguat

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

  • Stomach upset / Constipation / Vomiting Additional detail

    Ketogenic Diet

    Recorded for Ketogenic Diet in the same Natural Medicines adverse-effect record shown under Bleeding or bruising above.

    Riociguat

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

Showing the 10 most notable of 12 shared effects — ranked by how unusual each one is, not just whether both lists mention it.

Reported for Ketogenic Diet but not commonly for Riociguat: a higher chance of infection, a severe allergic reaction, blood clots and bone thinning.

Effects for Riociguat come from the ADVERSE REACTIONS section of its FDA label; effects for Ketogenic 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.

Special populations

Ketogenic Diet in Pregnancy & Breastfeeding

Lactation Possibly Unsafe

When used orally without medical supervision. While rare, there are several case reports of lactation ketoacidosis thought to be associated with adherence to calorie-restricted and non-calorie-restricted ketogenic diets. The increased metabolic demand of breastfeeding, especially if exclusively breastfeeding, may increase the risk of lactation ketoacidosis in these individuals. In addition to metabolic changes, symptoms included nausea, vomiting, dizziness, dyspnea, lethargy, epigastric pain, and chest pain. In one case, the lactation ketoacidosis was life-threatening and required treatment in the intensive care unit with non-invasive ventilatory support and dextrose and insulin infusions. In this case, the patient was following a calorie-restricted, ketogenic diet and had lost 19 pounds over 3 weeks.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

Everything else you take

See Every Supplement That Interacts With Riociguat

This page covers Ketogenic Diet only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Riociguat page lists 230 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), American Mistletoe (major), Grapefruit (major) and St. John's Wort (major).

By severity: 6 major · 187 moderate · 37 minor.

From our pharmacist’s overview on the Riociguat page

“Riociguat (Adempas) works by relaxing the blood vessels in your lungs, which also lowers blood pressure, so I read this list of 230 supplements and herbs with real concern, and the six rated major are what to understand first. Grapefruit can push riociguat levels up and intensify its effect, while St.”

Reviewed by 2 · Jul 18, 2026

Open the Riociguat interaction page

How much people look this up

Where Ketogenic Diet and Riociguat 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 Ketogenic Diet
Steady interest

#1,020 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Riociguat
Steady interest

#2,042 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 Ketogenic Diet reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Ketogenic Diet and Riociguat records this page draws on were last updated July 11, 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 Ketogenic Diet

What is Ketogenic Diet?

  • Weight loss
  • Type 2 diabetes and blood sugar control
  • Drug-resistant epilepsy (especially in children)
  • Reducing appetite
  • Athletic and metabolic interest

The ketogenic diet is a very low-carbohydrate, high-fat eating plan that shifts the body to burn fat for fuel. It has the strongest evidence as a medical therapy for hard-to-treat epilepsy and may help short-term weight loss and blood sugar, but it can be hard to sustain and is not right for everyone. Talk with a doctor or pharmacist before starting, especially if you have a medical condition or take medication.

Whole-food eating plan; sometimes paired with MCT oil or exogenous ketone supplements

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

Ketogenic Diet: dosing

There is no single "dose" for a ketogenic diet. Instead, it is defined by how much of your calories come from fat, protein, and carbohydrates. Strict therapeutic versions used for epilepsy keep carbohydrates very low and are calculated carefully by a medical team. More relaxed low-carb versions allow somewhat more carbohydrate.If you try keto on your own, follow guidance from a reputable source and pay attention to food quality, hydration, and electrolytes. Children should only follow a medical ketogenic diet under specialist supervision.

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

Read the full Ketogenic Diet monograph & all interactions
Medication

About Riociguat

What Is Riociguat Used For?

Brand name: Adempas

Riociguat tablets — sold as Adempas and under the generic name Riociguat — are used to treat adults with two types of pulmonary hypertension (high blood pressure in the lungs).

The first is chronic thromboembolic pulmonary hypertension (CTEPH), a condition caused by blood clots in the lung arteries, either after surgery or when surgery is not an option. The second is pulmonary arterial hypertension (PAH), where the arteries carrying blood to the lungs are narrowed or blocked. In both conditions, riociguat helps improve exercise ability and functional status, and in PAH it also helps slow the disease from getting worse.

Most-Reported Side Effects for Riociguat

From FAERS, the FDA’s public side-effect reporting system (32,415 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Dyspnea 5,718 reports
Headache 4,513 reports
Nausea 3,769 reports
Diarrhea 3,533 reports
Dizziness 3,522 reports
See full Riociguat drug information
Keep checking

Other Drugs & Ketogenic Diet

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

0Major
137Moderate
122Minor
2,570No known interaction
Moderate

137 interactions

Showing 60 of 137 moderate interactions — see all 137 on the Ketogenic Diet page.

Minor

122 interactions

Showing 60 of 122 minor interactions — see all 122 on the Ketogenic Diet page.

No interaction 2,570 drugs checked — show the list
Evidence & sources

Ketogenic Diet References

The 72 references that drive our Ketogenic 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. Liu H, Yang Y, Wang Y, et al. Ketogenic diet for treatment of intractable epilepsy in adults: A meta-analysis of observational studies. Epilepsia Open. 2018;3(1):9-17. PubMed
  2. Yancy WS Jr, Westman EC, McDuffie JR, et al. A randomized trial of a low-carbohydrate diet vs orlistat plus a low-fat diet for weight loss. Arch Intern Med. 2010;170(2):136-45. PubMed
  3. Goday A, Bellido D, Sajoux I, et al. Short-term safety, tolerability and efficacy of a very low-calorie-ketogenic diet interventional weight loss program versus hypocaloric diet in patients with type 2 diabetes mellitus. Nutr Diabetes. 2016;6(9):e230. PubMed
  4. Saslow LR, Mason AE, Kim S, et al. An online intervention comparing a very low-carbohydrate ketogenic diet and lifestyle recommendations versus a plate method diet in overweight individuals with type 2 diabetes: A randomized controlled trial. J Med Intern
  5. Hussain TA, Mathew TC, Dashti AA, Asfar S, Al-Zaid N, Dashti HM. Effect of low-calorie versus low-carbohydrate ketogenic diet in type 2 diabetes. Nutrition. 2012;28(10):1016-21. PubMed
  6. Martin-McGill KJ, Srikandarajah N, Marson AG, Tudur Smith C, Jenkinson MD. The role of ketogenic diets in the therapeutic management of adult and paediatric gliomas: a systematic review. CNS Oncol. 2018;7(2):CNS17.
  7. Michaels JD, Hoss E, DiCaudo DJ, Price H. Prurigo pigmentosa after a strict ketogenic diet. Pediatr Dermatol. 2015;32(2):248-51. PubMed
  8. Hawkes CP, Levine MA. Ketotic hypercalcemia: a case series and description of a novel entity. J Clin Endocrinol Metab. 2014;99(5):1531-6. PubMed
  9. Lima PA, de Brito Sampaio LP, Damasceno NR. Ketogenic diet in epileptic children: impact on lipoproteins and oxidative stress. Nutr Neurosci. 2015;18(8):337-44. PubMed
  10. Ulamek-Koziol M, Pluta R, Bogucka-Kocka A, Czuczwar SJ. To treat or not to treat drug-refractory epilepsy by the ketogenic diet? That is the question. Ann Agric Environ Med. 2016;23(4):533-536. PubMed
  11. Zahra A, Fath MA, Opat E, et al. Consuming a ketogenic diet while receiving radiation and chemotherapy for locally advanced lung cancer and pancreatic cancer: The University of Iowa experience of two phase 1 clinical trials. Radiat Res. 2017;187(6):743-75 PubMed
  12. Ahn WK, Park S, Kim HD. Protein-losing enteropathy as a complication of the ketogenic diet. Yonsei Med J. 2017;58(4):891-893. PubMed
  13. Winter SF, Loebel F, Dietrich J. Role of ketogenic metabolic therapy in malignant glioma: A systematic review. Crit Rev Oncol Hematol. 2017;112:41-58. PubMed
  14. Kverneland M, Selmer KK, Nakken KO, Iversen PO, Taubøll E. A prospective study of the modified Atkins diet for adults with idiopathic generalized epilepsy. Epilepsy Behav. 2015;53:197-201. PubMed
  15. Ashrafi MR, Hosseini SA, Zamani GR, et al. The efficacy of the ketogenic diet in infants and young children with refractory epilepsies using a formula-based powder. Acta Neurol Belg. 2017;117(1):175-182. 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 Ketogenic Diet While Taking Riociguat: Common Questions

Is it safe to follow Ketogenic Diet while taking Riociguat?
We do not list a known interaction between Ketogenic Diet and Riociguat. 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 Ketogenic Diet and Riociguat have any of the same side effects?
Yes — our sources link each of them separately to 10 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.
How was the Ketogenic Diet and Riociguat combination checked?
Interactions in our licensed database are recorded against drug classes. Riociguat is filed under 4 classifications, and Ketogenic Diet has documented interactions with 6 drug classes — none of Riociguat'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 Ketogenic Diet interact with any other medications?
Yes. Ketogenic Diet has 259 documented drug interactions in our database — Riociguat 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 Riociguat interact with any supplements?
Yes. Riociguat has documented interactions with 230 supplements in our database — Ketogenic Diet is not one of them. The Riociguat interaction page linked on this page lists every one, ranked by severity.

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

Still Have a Question About Riociguat and Ketogenic 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.