Drug & supplement interaction

Juice Fasting + Clemastine

Clemastine brand name: Tavist Allergy.

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 Juice Fasting and Clemastine 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

Juice Fasting and Clemastine

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

Worth understanding: our licensed dataset holds no drug-interaction record for Juice Fasting at all — not against Clemastine, 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.

Juice Fasting 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.

Juice Fasting safety at a glance

Juice Fasting overall Use caution Generally low-risk for short periods in healthy adults, but lacks protein and fiber and may cause side effects.
Pregnancy Possibly Unsafe During pregnancy and lactation. Juice fasting is not intended to provide adequate nutrition and can result in electrolyte imbalances when used short-term, as we... Read the full pregnancy detail
Breastfeeding Possibly Unsafe During pregnancy and lactation. Juice fasting is not intended to provide adequate nutrition and can result in electrolyte imbalances when used short-term, as we... 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 Clemastine and Juice Fasting? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Juice Fasting Itself Has Been Linked To

This is not an interaction — nothing below involves Clemastine. It is the side-effect record for Juice Fasting on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Juice Fasting, this list is the first place to look. 3 entries are worth acting on rather than waiting out — marked below.

  • An electrolyte imbalance Worth acting on Additional detail

    “There is currently a limited amount of reliable information available on the adverse effects of juice fasting. However, juice fasts do not provide adequate nutrition and involve the consumption of large quantities of water, which can lead to electrolyte imbalances when used short-term and malnutrition when used long-term.”

    Juice Fasting · Natural Medicines adverse-effect record, reported in malnutrition.

    4 sources cited
    1. 103181. National Center for Complementary and Integrative Health. "Detoxes" and "Cleanses": What you need to know. Available at: https://www.nccih.nih.gov/health/detoxes-and-cleanses-what-you-need-to-know. Updated September 2019. Accessed on: June 15, 2020.
    2. 103134. Makkapati S, D'Agati VD, Balsam L. "Green Smoothie Cleanse" Causing Acute Oxalate Nephropathy. Am J Kidney Dis. 2018 Feb;71(2):281-286. PubMed
    3. 103135. Lien YHH. Juicing is not all juicy. Am J Med. Sept 2013;126(9):755-6. PubMed
    4. 103136. Getting JE, Gregoire JR, Phul A, Kasten MJ. Oxalate nephropathy due to 'juicing': case report and review. Am J Med. Sept 2013;126(9):768-72. PubMed
  • Dehydration Worth acting on Additional detail

    “There are multiple case reports of oxalate-induced kidney injury in adults who are participating in juice fasts. It is likely that this kidney injury is due in part to the significant increase in oxalate consumption, as well as the reduction in calcium intake, that occurs during a juice fast.

    In one case report, a 65-year-old female developed acute oxalate nephropathy that progressed to end-stage renal disease after…”

    Juice Fasting · Natural Medicines adverse-effect record, reported in myasthenia gravis.

    5 sources cited
    1. 103135. Lien YHH. Juicing is not all juicy. Am J Med. Sept 2013;126(9):755-6. PubMed
    2. 103136. Getting JE, Gregoire JR, Phul A, Kasten MJ. Oxalate nephropathy due to 'juicing': case report and review. Am J Med. Sept 2013;126(9):768-72. PubMed
    3. 103134. Makkapati S, D'Agati VD, Balsam L. "Green Smoothie Cleanse" Causing Acute Oxalate Nephropathy. Am J Kidney Dis. 2018 Feb;71(2):281-286. PubMed
    4. 112307. Chaudhari H, Michaud J, Srialluri N, Mahendrakar S, Granz C, Yudd M. Acute Oxalate Nephropathy Caused by Excessive Vegetable Juicing and Concomitant Volume Depletion. Case Rep Nephrol 2022;2022:4349673. PubMed
    5. 112308. Obadan OI, Yudd M. AKI in a Patient Engaged in Vegetable Juicing. Kidney360 2020;1(7):716-717. PubMed
  • Kidney problems Worth acting on Additional detail

    Recorded for Juice Fasting in the same Natural Medicines adverse-effect record shown under An electrolyte imbalance above.

Everything above comes from the Natural Medicines adverse-effect record for Juice Fasting — expand a row for the licensed statement it rests on. We read the ADVERSE REACTIONS section of Clemastine’s FDA label too, and the two lists don’t meaningfully overlap — which is why no Clemastine column appears here.

Special populations

Juice Fasting in Pregnancy & Breastfeeding

Pregnancy And Lactation Possibly Unsafe

During pregnancy and lactation. Juice fasting is not intended to provide adequate nutrition and can result in electrolyte imbalances when used short-term, as well as malnutrition when used long-term.

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

From our Q&A

Questions About Juice Fasting or Clemastine

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Juice Fasting or Clemastine, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Clemastine

This page covers Juice Fasting only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Clemastine page lists 72 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Henbane (major), Scopolia (major), Alfalfa (moderate) and Angel's Trumpet (moderate).

By severity: 3 major · 57 moderate · 12 minor.

From our pharmacist’s overview on the Clemastine page

“Clemastine (Tavist Allergy) is an older, sedating antihistamine that already dries the mouth, blurs vision, and slows the gut, and that is exactly why this list earns real caution rather than a quick skim. Thirty of the 72 supplements on file pile the same drying, sedating anticholinergic load on top, and two of the three major-rated e…”

Reviewed by 2 · Jul 18, 2026

Open the Clemastine interaction page

How much people look this up

Where Juice Fasting and Clemastine 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 Juice Fasting
Steady interest

#1,106 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Clemastine
Steady interest

#2,561 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 Juice Fasting reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Juice Fasting and Clemastine 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 Juice Fasting

What is Juice Fasting?

  • Weight loss
  • Detoxification or 'cleansing'
  • Boosting fruit and vegetable intake
  • Improving energy or well-being
  • Resetting eating habits

Juice fasting means consuming only fruit and vegetable juices for a set period, often marketed for 'detox' or quick weight loss. There is little solid evidence that it cleanses the body or offers lasting health benefits, and your liver and kidneys already remove toxins on their own. Short juice fasts are low-risk for healthy adults, but they can be unsafe for some people, so check with a pharmacist or doctor first.

Fruit and vegetable juices · Fresh-pressed (cold-pressed) juices, store-bought juice blends, commercial juice-cleanse programs

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

Juice Fasting: dosing

There is no standardized or medically established way to do a juice fast. Programs vary widely in how many juices are consumed per day and how long the fast lasts.If you choose to try a short juice fast, keeping it brief (about one to three days), staying well hydrated with water, and easing back into solid food gradually are common-sense steps.

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

Read the full Juice Fasting monograph & all interactions
Medication

About Clemastine

What Is Clemastine Used For?

Brand name: Tavist Allergy

Clemastine treats symptoms of allergic rhinitis (hay fever and similar nasal allergies) — including sneezing, runny nose, itching, and watery eyes. The oral solution (Clemastine Fumarate syrup) is indicated for adults and children aged 6 through 12 years. The tablets (Clemastine Fumarate and Clemsza) are indicated for adults.

Clemastine also treats mild, uncomplicated allergic skin reactions — specifically urticaria (hives) and angioedema (swelling under the skin) — at the appropriate dosage level, in both the oral solution and tablet forms.

See full Clemastine drug information
Keep checking

Other Drugs & Juice Fasting

Browse every other medication we’ve checked against Juice Fasting — 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 Juice Fasting 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 Juice Fasting list.

See the full Juice Fasting interactions page
See every supplement checked against Clemastine, ranked by severity
Evidence & sources

Juice Fasting References

The 8 references that drive our Juice Fasting 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. Shetty P, Mooventhan A, Nagendra HR. Does short-term lemon honey juice fasting have effect on lipid profile and body composition in healthy individuals? J Ayurveda Integr Med. 2016 Mar;7(1):11-3. PubMed
  2. Huber R, Nauck M, Lüdtke R, Scharnagl H. Effects of one week juice fasting on lipid metabolism: a cohort study in healthy subjects. Forsch Komplementarmed Klass Naturheilkd. 2003 Feb;10(1):7-10. PubMed
  3. Makkapati S, D'Agati VD, Balsam L. "Green Smoothie Cleanse" Causing Acute Oxalate Nephropathy. Am J Kidney Dis. 2018 Feb;71(2):281-286. PubMed
  4. Lien YHH. Juicing is not all juicy. Am J Med. Sept 2013;126(9):755-6. PubMed
  5. Getting JE, Gregoire JR, Phul A, Kasten MJ. Oxalate nephropathy due to 'juicing': case report and review. Am J Med. Sept 2013;126(9):768-72. PubMed
  6. National Center for Complementary and Integrative Health. "Detoxes" and "Cleanses": What you need to know. Available at: https://www.nccih.nih.gov/health/detoxes-and-cleanses-what-you-need-to-know. Updated September 2019. Accessed on: June 15, 2020.
  7. Chaudhari H, Michaud J, Srialluri N, Mahendrakar S, Granz C, Yudd M. Acute Oxalate Nephropathy Caused by Excessive Vegetable Juicing and Concomitant Volume Depletion. Case Rep Nephrol 2022;2022:4349673. PubMed
  8. Obadan OI, Yudd M. AKI in a Patient Engaged in Vegetable Juicing. Kidney360 2020;1(7):716-717. 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 Juice Fasting While Taking Clemastine: Common Questions

Is it safe to follow Juice Fasting while taking Clemastine?
We do not list a known interaction between Juice Fasting and Clemastine. 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.
Does Clemastine interact with any supplements?
Yes. Clemastine has documented interactions with 72 supplements in our database — Juice Fasting is not one of them. The Clemastine 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

Juice Fasting monograph Uses, safety profile, and every drug interaction in one place Clemastine drug information The full plain-English guide to this medication Clemastine supplement interactions Every supplement checked against Clemastine, 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 8 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Clemastine and Juice Fasting?

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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.