Fo-ti + Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide
Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide brand names: Rhinogesic JR, Rhinogesic.
Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide falls into 3 drug categories that Fo-ti can interact with; the most serious is rated moderate. Theoretically, fo-ti might increase or decrease the levels and clinical effects of drugs metabolized by CYP1A2.
Read the full interaction reportFo-ti and Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide
These two interact in 3 distinct ways. Each one is explained separately below.
Why Are There 3 Interactions?
Fo-ti interacts with whole categories of medication. Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide falls into 3 of those categories, so it can interact with Fo-ti in 3 different ways. We’ve listed each one below — your overall risk is driven by the most serious of them (Moderate).
CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES
1 of 3Why this applies to Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide
Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide falls under CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES — the group Fo-ti interacts with.
In vitro research suggests that fo-ti might inhibit CYP1A2. Additionally, in vitro research suggests that the degree of CYP1A2 inhibition depends on the type of fo-ti extract (i.e., the raw plant leads to greater inhibition than extensively processed extracts). However, in an animal study, an aqueous extract of fo-ti inhibited CYP1A2 while an alcoholic extract of fo-ti induced CYP1A2. Induction or inhibition of CYP1A2 by fo-ti has not been reported in humans.
Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
This combination cold-and-allergy product (Rhinogesic) mixes a fever and pain reliever (acetaminophen), an antihistamine (chlorpheniramine), a decongestant (phenylephrine), and a pain reliever (salicylamide). The concern here is that fo-ti may affect a liver enzyme called CYP1A2, which helps process certain medicines. In theory, if fo-ti slows this enzyme, levels of an affected ingredient could creep up, possibly adding to side effects like drowsiness, dry mouth, or stomach upset.
Honestly, this is a weak, theoretical concern. It comes only from lab and animal studies, and confusingly, some fo-ti extracts sped the enzyme up while others slowed it down. Nothing like this has been shown in people. Still, since fo-ti has been linked to liver injury and this product contains acetaminophen, it's worth a quick chat with your pharmacist before combining them.
- Unger M, Frank A. Simultaneous determination of the inhibitory potency of herbal extracts on the activity of six major cytochrome P450 enzymes using liquid chromatography/mass spectrometry and automated online extraction. Rapid Commun Mass Spectrom 2004;1 PubMed
- Zhang Y, Ding T, Diao T, Deng M, Chen S. Effects of Polygonum multiflorum on the activity of cytochrome P450 isoforms in rats. Pharmazie 2015;70(1):47-54. DOI
- Xing Y, Yu Q, Zhou L, et al. Cytochrome P450-mediated herb-drug interaction (HDI) of Polygonum multiflorum Thunb. based on pharmacokinetic studies and in vitro inhibition assays. Phytomedicine 2023;112:154710. PubMed
HEPATOTOXIC DRUGS
2 of 3Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide also falls under HEPATOTOXIC DRUGS.
Fo-ti has been linked to liver damage in many reports.
Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
This combination cold-and-pain product contains acetaminophen (the same active ingredient as Tylenol), which your liver has to process. Acetaminophen is well known to be tough on the liver if you take too much or use it for a long stretch. Fo-ti has been linked, in a number of case reports, to liver injury of its own. So the concern here is simple: stacking two things that can stress the liver may add up.
To be honest, this is a theoretical worry based mostly on scattered reports, not strong studies, so I don't want to alarm you. Still, if you notice yellowing of the skin or eyes, dark urine, belly pain, or unusual fatigue, stop and get checked. Please ask your pharmacist or doctor before pairing the two.
- Park GJ, Mann SP, Ngu MC. Acute hepatitis induced by Shou-Wu-Pian, a herbal product derived from Polygonum multiflorum. J Gastroenterol Hepatol 2001;16:115-7.
- But PP, Tomlinson B, Lee KL. Hepatitis related to the Chinese medicine Shou-wu-pian manufactured from Polygonum multiflorum. Vet Hum Toxicol 1996;38:280-2.
- UK Medicines and Healthcare Products Regulatory Agency. Polygonum multiflorum and liver reactions. April 2006. Available at: www.mhra.gov.uk/home/idcplg?IdcService= SS_GET_PAGE&useSecondary=true&ssDocName= CON2023590&ssTargetNodeId= 833 (Accessed 10 May 2
- Panis B, Wong DR, Hooymans PM, De Smet PA, Rosias PP. Recurrent toxic hepatitis in a Caucasian girl related to the use of Shou-Wu-Pian, a Chinese herbal preparation. J Pediatr Gastroenterol Nutr 2005;41:256-8. PubMed
- Mazzanti G, Battinelli L, Daniele C, et al. New case of acute hepatitis following the consumption of Shou Wu Pian, a Chinese herbal product derived from Polygonum multiflorum. Ann Intern Med 2004;140:E589-90.
- Cardenas A, Restrepo JC, Sierra F, Correa G. Acute hepatitis due to shen-min: a herbal product derived from Polygonum multiflorum. J Clin Gastroenterol 2006;40:629-32. PubMed
- Laird AR, Ramchandani N, deGoma EM, et al. Acute hepatitis associated with the use of an herbal supplement (Polygonum multiflorum) mimicking iron-overload syndrome. J Clin Gastroenterol 2008;42:861-2. PubMed
- Jung KA, Min HJ, Yoo SS, et al. Drug-Induced Liver Injury: Twenty Five Cases of Acute Hepatitis Following Ingestion of Polygonum multiflorum Thunb. Gut Liver 2011;5(4):493-9. PubMed
- Yuen, M. F., Tam, S., Fung, J., Wong, D. K., Wong, B. C., and Lai, C. L. Traditional Chinese medicine causing hepatotoxicity in patients with chronic hepatitis B infection: a 1-year prospective study. Aliment.Pharmacol.Ther 10-15-2006;24(8):1179-1186. PubMed
- Bae, S. H., Kim, D. H., Bae, Y. S., Lee, K. J., Kim, D. W., Yoon, J. B., Hong, J. H., and Kim, S. H. [Toxic hepatitis associated with Polygoni multiflori]. Korean J.Hepatol. 2010;16(2):182-186. PubMed
- Furukawa, M., Kasajima, S., Nakamura, Y., Shouzushima, M., Nagatani, N., Takinishi, A., Taguchi, A., Fujita, M., Niimi, A., Misaka, R., and Nagahara, H. Toxic hepatitis induced by show-wu-pian, a Chinese herbal preparation. Intern.Med. 2010;49(15):1537-1 PubMed
- Dong H, Slain D, Cheng J, Ma W, Liang W. Eighteen cases of liver injury following ingestion of Polygonum multiflorum. Complement Ther Med 2014;22(1):70-4. PubMed
- Lei X, Chen J, Ren J, et al. Liver damage associated with Polygonum multiflorum Thunb.: a systematic review of case reports and case series. Evid Based Complement Alternat Med 2015;2015:459749.
CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES
3 of 3Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide also falls under CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES.
In vitro research suggests that fo-ti might inhibit CYP3A4. One in vitro study suggests that the degree of CYP3A4 inhibition may depend on the type of fo-ti extract (i.e., the raw plant leads to greater inhibition than extensively processed extracts). However, this evidence conflicts with animal research suggesting that fo-ti does not inhibit CYP3A4. This interaction has not been reported in humans.
Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
This cold-and-allergy combo (acetaminophen, chlorpheniramine, phenylephrine, and salicylamide) is a multi-ingredient product, and a few of these pieces lean on the CYP3A4 enzyme as part of how your body processes them. In theory, Fo-ti might slow that enzyme down, which could let certain ingredients build up a bit more than usual. If that happened, you might notice stronger versions of the usual effects, like extra drowsiness or dry mouth from the antihistamine, or a more jittery, racing-heart feeling from the phenylephrine decongestant.
Here's the honest part: this is only a theoretical concern based on lab studies, and it has never actually been reported in people. Animal data even pushed back on it. So I wouldn't panic, but since both can stress the liver, it's worth a quick chat with your pharmacist before pairing them.
- Unger M, Frank A. Simultaneous determination of the inhibitory potency of herbal extracts on the activity of six major cytochrome P450 enzymes using liquid chromatography/mass spectrometry and automated online extraction. Rapid Commun Mass Spectrom 2004;1 PubMed
- Zhang Y, Ding T, Diao T, Deng M, Chen S. Effects of Polygonum multiflorum on the activity of cytochrome P450 isoforms in rats. Pharmazie 2015;70(1):47-54. DOI
- Xing Y, Yu Q, Zhou L, et al. Cytochrome P450-mediated herb-drug interaction (HDI) of Polygonum multiflorum Thunb. based on pharmacokinetic studies and in vitro inhibition assays. Phytomedicine 2023;112:154710. PubMed
What These Ratings Mean
Every interaction above is graded three ways — here’s the key to each label.
Clinically significant. Avoid the combination, or use only under close professional supervision.
Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.
Generally not serious. Be aware of it and mention it to your pharmacist.
- LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
- ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
- PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
- UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
- AHigh-quality meta-analysis (quantitative systematic review).
- BCase-control study.
- CConsensus.
- DAnecdotal evidence.
These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.
Fo-ti Also Interacts With Other Medications
Fo-ti has 1,256 moderate known drug interactions in our database — the Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide one above is among them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Fo-ti
We haven’t checked that one against Fo-ti yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Fo-ti. Pick one to open its full report.
See Every Supplement That Interacts With Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide
This page covers Fo-ti only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide page lists 292 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Asarabacca (major), Beer (major), Ephedra (major) and Grapefruit (major).
By severity: 14 major · 232 moderate · 46 minor.
From our pharmacist’s overview on the Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide page
“I would slow down before pairing supplements with Rhinogesic (acetaminophen, chlorpheniramine, phenylephrine, salicylamide). Each part of this cold remedy opens a different door to trouble, so supplements can collide with it from several directions at once.”
Reviewed by 2 · Jul 18, 2026
Open the Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interaction page
Taking Fo-ti as Part of a Dietary Supplement Product? Check It for Interactions
We hold 976 real supplement products containing Fo-ti, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Fo-ti. Your product may carry other ingredients that interact with Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide too, on top of Fo-ti — and those would not show on this page. Find your product and we’ll check every ingredient on its label:
Where Fo-ti and Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide 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.
#190 of 1,452 supplements looked up here in the last 7 days
#65 of 2,830 medications looked up here in the last 7 days
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.
About Fo-ti
What is Fo-ti?
- Anti-aging and longevity
- Hair graying and hair loss
- General tonic for vitality
- Constipation
- High cholesterol
Fo-ti (He Shou Wu) is a root used in traditional Chinese medicine, often promoted for healthy aging and hair. High-quality human evidence for these benefits is limited, and processed Fo-ti has been linked to reports of liver injury, so caution and professional guidance are important.
Other Drugs & Fo-ti
Browse every other medication we’ve checked against Fo-ti — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
1,256 interactions
- Diclofenac Sodium ›
- Diltiazem ›
- Theophylline ›
- Nifedipine ›
- Ibuprofen ›
- Aspirin ›
- Hydrocortisone ›
- Insulin (rdna) ›
- Naproxen ›
- Doxycycline ›
- Erythromycin ›
- Estradiol ›
- Minocycline ›
- Propranolol ›
- Tetracycline ›
- Lidocaine ›
- Amoxicillin ›
- Hydrochlorothiazide ›
- Norethindrone ›
- Testosterone ›
- Verapamil ›
- Fenofibrate ›
- Levonorgestrel ›
- Prednisone ›
- Quinidine ›
- Cyclosporine ›
- Dexamethasone ›
- Glyburide ›
- Insulin (pork) ›
- Methyltestosterone ›
- Triazolam ›
- Zopiclone ›
- Bupropion ›
- Ciprofloxacin ›
- Colchicine ›
- Fentanyl ›
- Flurbiprofen ›
- Isotretinoin ›
- Orphenadrine ›
- Oxybutynin ›
- Oxycodone ›
- Phenytoin ›
- Prednisolone ›
- Tacrolimus ›
- Temazepam ›
- Allopurinol ›
- Budesonide ›
- Carbamazepine ›
- Clindamycin ›
- Dextromethorphan ›
- Diclofenac Potassium ›
- Dipyridamole ›
- Doxorubicin ›
- Fluticasone ›
- Formoterol ›
- Indomethacin ›
- Insulin (human) ›
- Miconazole ›
- Morphine Sulfate ›
- Trimipramine ›
Showing 60 of 1,256 moderate interactions — see all 1,256 on the Fo-ti page.
No interaction 1,573 drugs checked — show the list
We also checked Fo-ti against these medications and found no known interaction in our sources. Open any page to confirm.
- Levothyroxine ›
- Methylphenidate ›
- Ivermectin ›
- Escitalopram ›
- Docusate ›
- Sumatriptan ›
- Valacyclovir ›
- Hydroxyurea ›
- Lisinopril ›
- Levothyroxine, Liothyronine ›
- Azithromycin ›
- Pregabalin ›
- Lamotrigine ›
- Acyclovir ›
- Gabapentin ›
- Methylene Blue ›
- Candesartan Cilexetil ›
- Ezetimibe ›
- Cyclopentolate ›
- Cephalexin ›
- Thyroid Hormone ›
- Calcium Oxybate, Magnesium Oxybate, Potassium Oxybate, Sodium Oxybate ›
- Levetiracetam ›
- Roxithromycin ›
- Levodopa ›
- Carbidopa, Levodopa ›
- Alginic Acid, Aluminum Hydroxide ›
- Acetaminophen, Dextromethorphan, Doxylamine ›
- Mitomycin ›
- Atenolol ›
- Avatrombopag Maleate ›
- Levothyroxine Sodium ›
- Dexmethylphenidate ›
- Minoxidil ›
- Amobarbital, Ephedrine Sulfate ›
- Flutemetamol F-18 ›
- Atropine Methyl Nitrate, Digestive Enzymes ›
- Ceftolozane Sulfate, Tazobactam Sodium ›
- Cefaclor ›
- Daptomycin ›
- Articaine, Epinephrine ›
- Peginterferon Alfa-2a, Ribavirin ›
- Enalapril Maleate ›
- Charcoal (otc Drug) ›
- Phentermine, Topiramate ›
- Hydroxychloroquine ›
- Olmesartan Medoxomil ›
- Hydrocortisone, Clioquinol, Pramoxine ›
- Ephedrine, Phenobarbital, Theophylline ›
- Alpha-1 Proteinase Inhibitor ›
- Alendronate Sodium, Cholecalciferol ›
- Colistin, Neomycin, Hydrocortisone ›
- Factor 7a ›
- Aminolevulinic Acid Hydrochloride ›
- Hexobarbitone ›
- Efgartigimod Alfa-fcab ›
- Pegunigalsidase Alfa-iwxj ›
- Bentoquatam ›
- Telmisartan ›
- Droxidopa ›
Showing the 60 most looked-up of 1,573 medications checked with no known interaction — see the full Fo-ti list.
Sources & How We Checked
Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference for vitamins, herbs and supplements — the basis for our interaction data.
- MedlinePlus, U.S. National Library of Medicine — NIH consumer drug information, used for the medication overviews.
- NIH Dietary Supplement Label Database (DSLD) — Official supplement product labels.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.
Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC
Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide Is Linked to Lower Levels of One Nutrient
Natural Medicines records Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide as a medicine that can lower these. This is not an interaction with Fo-ti — it is a separate effect of the medicine, and it is a reason some people are advised to supplement rather than to avoid one:
Depletion records come from the licensed Natural Medicines database. Do not start a supplement on the strength of this page — ask your pharmacist or doctor whether it applies to you.
Taking Fo-ti and Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide Together: Common Questions
Can you take Fo-ti with Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide?
Why are there 3 interactions listed for Fo-ti and Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide?
How serious is the Fo-ti and Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interaction?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Still Have a Question About Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide and Fo-ti?
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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.