Drug & supplement interaction

Focusing + Selegiline

Selegiline brand names: Carbex, Eldepryl, Emsam, Zelapar.

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

We found no known interaction between Focusing and Selegiline 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

Focusing and Selegiline

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 Selegiline and Focusing in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

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

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. 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.

Focusing safety at a glance

Focusing overall Not established Safety depends entirely on the specific ingredients in a given product.
Pregnancy Avoid Ingredients are unverified and unstudied in pregnancy, so it is best to avoid.
Breastfeeding Avoid Not enough safety information exists, so avoid while breastfeeding.

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

Still wondering about combining Selegiline and Focusing? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Selegiline’s Own FDA Label Lists

This is not an interaction — none of it involves Focusing. These are the most notable effects listed in the ADVERSE REACTIONS section of Selegiline’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 9 of them are worth acting on rather than waiting out — marked below.

  • Hallucinations Worth acting on mentioned in 6.5% of FDA reports for Selegiline
  • Mania or an unusually elevated mood Worth acting on
  • Serotonin syndrome Worth acting on
  • Thoughts of self-harm Worth acting on
  • Memory problems Worth acting on
  • Confusion Worth acting on
  • Seizures Worth acting on
  • Raised blood pressure Worth acting on
  • A higher chance of infection Worth acting on
  • A change in sex drive

Showing the 10 most notable of 32 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Selegiline. Read the label on DailyMed › Where a percentage is shown, it is the share of 3,469 voluntary FDA FAERS reports for Selegiline that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Focusing’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Focusing side to compare — that is a limit of the record, not a statement that Focusing has no side effects.

Everything else you take

See Every Supplement That Interacts With Selegiline

This page covers Focusing only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Selegiline page lists 102 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Beer (major), Bitter Orange (major), Brewer's Yeast (major) and Cowhage (major).

By severity: 14 major · 75 moderate · 13 minor.

Open the Selegiline interaction page

How much people look this up

Where Focusing and Selegiline 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 Focusing
Steady interest

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

29 days ago today
Medication Selegiline
Top half

#720 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 Focusing reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Focusing and Selegiline records this page draws on were last updated June 22, 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 .
Supplement

About Focusing

What is Focusing?

  • Concentration and attention
  • Mental clarity
  • Memory support
  • Studying or work productivity
  • Reducing mental fatigue

"Focusing" is not a single herb or recognized plant — it is a marketing term used for blended supplements that claim to support concentration and mental clarity. Because the exact ingredients differ by brand, there is no single set of evidence, dose, or safety profile, so you must read each product's label carefully. Talk to a pharmacist or doctor before using any focus supplement, especially if you take other medicines or have a health condition.

Capsules, tablets, powders, drink mixes (usually blended formulas)

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

Focusing: dosing

There is no established standard dose for "Focusing," because it is not a single defined ingredient. Dosing depends entirely on the specific product and its ingredients.Follow the directions on the product label and do not exceed the recommended amount. Be especially mindful of total caffeine from all sources.

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

Read the full Focusing monograph & all interactions
Medication

About Selegiline

What Is Selegiline Used For?

Brand names: Carbex, Eldepryl, Emsam, Zelapar

Selegiline is used as an add-on treatment for people with Parkinson's disease who are already taking levodopa/carbidopa but are finding that the medication's effects are wearing off or becoming less reliable. It is not used alone — it only works as part of a combination approach.

In clinical studies, adding selegiline helped reduce the amount of daily levodopa needed, cut down on "off" time (periods when symptoms break through), and improved things like tremor, speech, movement, and overall daily function.

Most-Reported Side Effects for Selegiline

From FAERS, the FDA’s public side-effect reporting system (3,526 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Hallucination 230 reports
Insomnia 206 reports
Dizziness 196 reports
Fall 186 reports
Application site erythema 185 reports
See full Selegiline drug information
Keep checking

Other Drugs & Focusing

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

See the full Focusing interactions page
See every supplement checked against Selegiline, ranked by severity
Evidence & sources

Focusing References

The 20 references that drive our Focusing 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. Allard, N. C. Day surgery for breast cancer: effects of a psychoeducational telephone intervention on functional status and emotional distress. Oncol Nurs Forum 2007;34(1):133-141. PubMed
  2. Pettinati, M. D. The relative efficacy of various complementary modalities in the lives of patients with chronic pain: A pilot study. The USA Body Psychotherapy 2002;1(2):5-26.
  3. Cirstea, M. C. and Levin, M. F. Improvement of arm movement patterns and endpoint control depends on type of feedback during practice in stroke survivors. Neurorehabil .Neural Repair 2007;21(5):398-411. PubMed
  4. Klagsbrun, J., Rappaport, L., Marcow Speiser, V., Post, P., Byers, J., Stepakoff, S., and Karman, S. Focusing and expressive arts therapy as a complementary treatment for women with breast cancer. Journal of Creativity in Mental Health: The official journ DOI
  5. Katonah, D. G. and Flaxman, J. Focusing: An Adjunct Treatment for Adaptive Recovery from Cancer. The Folio 1999;18(1).
  6. Chiviacowsky S, Wulf G, Avila LTG. An external focus of attention enhances motor learning in children with intellectual disabilities. J Intellect Disabil Res. 2013;57(7):627-34. PubMed
  7. Donald J, Abbott MJ, Smith E. Comparison of attention training and cognitive therapy in the treatment of social phobia: a preliminary investigation. Behav Cogn Psychother. 2014;42(1):74-91. PubMed
  8. Landers MR, Hatlevig RM, Davis AD, Richards AR, Rosenlof LE. Does attentional focus during balance training in people with Parkinson's disease affect outcome? A randomised controlled clinical trial. Clin Rehabil. 2016;30(1):53-63. PubMed
  9. Laufer Y, Rotem-Lehrer N, Ronen Z, Khayutin G, Rozenberg I. Effect of attention focus on acquisition and retention of postural control following ankle sprain. Arch Phys Med Rehabil. 2007;88(1):105-8. PubMed
  10. Perreault ME, French KE. Differences in children's thinking and learning during attentional focus instruction. Hum Mov Sci. 2016;45:154-60. PubMed
  11. Rotem-Lehrer N, Laufer Y. Effect of focus of attention on transfer of a postural control task following an ankle sprain. J Orthop Sports Phys Ther. 2007;37(9):564-9. PubMed
  12. Schoenfeld BJ, Vigotsky A, Contreras B, et al. Differential effects of attentional focus strategies during long-term resistance training. Eur J Sport Sci. 2018;18(5):705-712. PubMed
  13. Zou JB, Hudson JL, Rapee RM. The effect of attentional focus on social anxiety. Behav Res Ther. 2007;45(10):2326-33. PubMed
  14. Aghakeshizadeh F, Letafatkar A, Thomas AC. Internal and external focus show similar effect on the gait kinematics in patients with patellofemoral pain: A randomised controlled trial. Gait Posture 2021;84:155-161. PubMed
  15. Ghanati HA, Letafatkar A, Almonroeder TG, Rabiei P. Examining the Influence of Attentional Focus on the Effects of a Neuromuscular Training Program in Male Athletes. J Strength Cond Res 2020. 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

Taking Focusing and Selegiline Together: Common Questions

Is it safe to take Focusing with Selegiline?
We do not list a known interaction between Focusing and Selegiline. 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 Selegiline interact with any supplements?
Yes. Selegiline has documented interactions with 102 supplements in our database — Focusing is not one of them. The Selegiline 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

Focusing monograph Uses, safety profile, and every drug interaction in one place Selegiline drug information The full plain-English guide to this medication Selegiline supplement interactions Every supplement checked against Selegiline, 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 20 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Selegiline and Focusing?

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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.