Drug & supplement interaction

Acacia Rigidula + Lenacapavir

Lenacapavir brand name: Sunlenca.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Acacia Rigidula has a moderate interaction with Lenacapavir. Theoretically, Acacia rigidula products that are adulterated with beta-methylphenylethylamine (BMPEA) might increase the levels of CYP3A4 substrates.

Read the full interaction report
SeverityModerate
LikelihoodPossible
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Acacia Rigidula and Lenacapavir

Here is the interaction we found between these two, with the evidence behind it.

Moderate

CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES

Why this applies to Lenacapavir

Lenacapavir falls under CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES — the group Acacia Rigidula interacts with.

Theoretically, Acacia rigidula products that are adulterated with beta-methylphenylethylamine (BMPEA) might increase the levels of CYP3A4 substrates.
In vitro research shows that BMPEA, an adulterant found in many Acacia rigidula products, inhibits CYP3A4 enzyme by 37%.
Severity Moderate Likelihood Possible Evidence D

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.

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the basic idea with Lenacapavir (Sunlenca), a long-acting HIV medicine. Your body uses an enzyme called CYP3A4 to help clear it out. Some Acacia rigidula products have been found to contain a hidden stimulant called BMPEA, and in lab testing BMPEA slowed that enzyme down by about a third. If that slowdown happened in a real person, lenacapavir could build up a bit higher than expected.

I want to be honest about how soft this evidence is. It comes only from a test-tube study, not from people, so it's theoretical. Still, since Acacia rigidula products are often adulterated and poorly regulated, I'd skip them and check with your pharmacist or HIV provider before adding any energy or weight-loss supplement.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Liu Y, Santillo MF. Cytochrome P450 2D6 and 3A4 enzyme inhibition by amine stimulants in dietary supplements. Drug Test Anal. 2016;8(3-4):307-10. PubMed

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • 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.
Evidence the quality of the studies behind the rating (graded A–D)
  • 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.

Keep it in perspective

Acacia Rigidula Also Interacts With Other Medications

Acacia Rigidula has 812 moderate known drug interactions in our database — the Lenacapavir one above is one of them. If you take anything else, check it against the full list below.

Moderate 812 No known interaction 2,018 (incl. Lenacapavir)
Taking anything else?

Check Another of Your Medications Against Acacia Rigidula

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

Everything else you take

See Every Supplement That Interacts With Lenacapavir

This page covers Acacia Rigidula only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Lenacapavir page lists 138 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Grapefruit (major), St. John's Wort (major), Adrafinil (moderate) and African Wild Potato (moderate).

By severity: 3 major · 94 moderate · 41 minor.

From our pharmacist’s overview on the Lenacapavir page

“Lenacapavir (Sunlenca) treats HIV that has resisted other regimens, so keeping its blood level steady is not optional, and its list of 138 interacting supplements deserves genuine care. Nearly all of them, 121 ingredients, can shift how the body handles lenacapavir through the CYP3A4 enzyme, either pushing its level up along with side…”

Reviewed by 2 · Jul 18, 2026

Open the Lenacapavir interaction page

How much people look this up

Where Acacia Rigidula and Lenacapavir 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 Acacia Rigidula
Top half

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

29 days ago today
Medication Lenacapavir
Top half

#1,374 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.

Supplement

About Acacia Rigidula

What is Acacia Rigidula?

Acacia Rigidula
  • Weight loss
  • Energy and stimulation
  • Boosting metabolism
  • Appetite control
  • Pre-workout/athletic performance

Acacia rigidula is a shrub from Texas and Mexico that is marketed in weight-loss and energy supplements. There is very little reliable human evidence that it works, and some products have been found to contain an unapproved stimulant drug (BMPEA), which raises real safety concerns. Most people should avoid it and talk to a pharmacist or doctor before trying any product containing it.

Read the full Acacia Rigidula monograph & all interactions
Medication

About Lenacapavir Oral

What Is Lenacapavir Oral Used For?

Brand name: Sunlenca

Sunlenca tablets are used in two situations: to treat HIV-1 infection in adults whose virus has become resistant to multiple antiretroviral drugs and whose current regimen is failing — always in combination with other antiretrovirals — and as a short oral loading dose to start the BIXLENVO complete HIV-1 treatment regimen in adults who are already virologically suppressed (virus undetectable) and switching from a stable antiretroviral regimen.

Yeztugo tablets are used as part of HIV-1 pre-exposure prophylaxis (PrEP) — helping HIV-negative people reduce their risk of getting HIV-1. The oral tablet form is used during initiation of Yeztugo, and also as a temporary oral bridge if a scheduled injection must be delayed more than two weeks.

See full Lenacapavir Oral drug information
Keep checking

Other Drugs & Acacia Rigidula

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

0Major
812Moderate
0Minor
2,017No known interaction
812 Moderate 2,017 No interaction
Moderate

812 interactions

Showing 60 of 812 moderate interactions — see all 812 on the Acacia Rigidula page.

No interaction 2,017 drugs checked — show the list

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

Showing the 60 most looked-up of 2,017 medications checked with no known interaction — see the full Acacia Rigidula list.

See the full Acacia Rigidula interactions page
See every supplement checked against Lenacapavir, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

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

Keep exploring
Acacia Rigidula monograph › Uses, safety, and every drug interaction in one place Lenacapavir supplement interactions › Every supplement checked against Lenacapavir, ranked by severity Lenacapavir Oral drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Acacia Rigidula and Lenacapavir Together: Common Questions

Can you take Acacia Rigidula with Lenacapavir?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Acacia Rigidula and Lenacapavir interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

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

Still Have a Question About Lenacapavir and Acacia Rigidula?

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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.