Attention Deficit Hyperactivity DisorderPhase 4NCT02737033
Effects of 800mg of Rhodiola Rosea in Attention in Adults With Attention-Deficit/Hyperactivity Disorder
A Phase 4 study testing Rhodiola in people with Attention Deficit Hyperactivity Disorder, run by Hospital de Clinicas de Porto Alegre at 1 site in Brazil.
Trial summary
This study evaluates the use of Rhodiola rosea in the attention of adults with Attention Deficit/Hyperactivity Disorder (ADHD). Half of participants will receive Rhodiola rosea 800mg, while the other half will receive 800mg of placebo. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Attention Deficit Hyperactivity Disorder
- What is being tested?
- Rhodiola
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 60 participants
- Where
- 1 siteBrazil
- Study dates
- Apr 2016to Mar 2021
- Phase
- Phase 4
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Fulfillment of Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, (DSM-5) diagnostic criteria for ADHD in Adults
- Intelligence Quotient (IQ) above 70
- Eligibility to Rhodiola rosea
Who cannot join
- clinical contraindication to Rhodiola rosea
- any unstable chronic illness without proper treatment (hypertension, heart, kidney or liver disease, etc)
- any significant neurological disease (delirium, dementia, epilepsy, AIDS, head trauma, multiple sclerosis, stroke, etc)
- unstable psychiatric comorbidities requiring immediate treatment (risk of suicide, current Substance Use Disorder, etc.)
- pregnant, nursing or absence of reliable contraception
- current use of nicotine (<30 days)
Show all 11Show fewer
- use of anticoagulants
- current use of any psychoactive drug (<30 days)
- prior use of stimulants
- current or lifetime psychosis
- current or lifetime bipolar disorder
Trial locations and contacts
1 site in 1 country.
Brazil1 site, 1 recruiting
- Recruiting
Hospital de Clínicas de Porto Alegre
Porto Alegre, Rio Grande do Sul, 90035-903
Eugenio H Grevet, PhD, 555199877602, ehgrevet@gmail.com
Marcelo M Victor, PhD, 55 51 99639500, mvictor@via-rs.net
About this study
This study evaluates the use of Rhodiola rosea in the attention of adults with Attention Deficit/Hyperactivity Disorder (ADHD). Half of participants will receive Rhodiola rosea 800mg, while the other half will receive 800mg of placebo.
Read the detailed description
The evaluation of new therapies in adults with Attention Deficit/Hyperactivity Disorder (ADHD) may be clinically useful. Rhodiola rosea is an herbal medicine used for centuries in various medical conditions. Many randomized controlled trials have evaluated its usefulness in stress and fatigue. There were benefits in attention in some of these studies. Mild side effects and beneficial antioxidant properties make reasonable an assessment of its potential benefits in adults with ADHD. To our knowledge, Rhodiola rosea has never been studied in adults with ADHD.
- Conditions
- Attention Deficit Hyperactivity Disorder
- Being tested
- Rhodiola, Placebo
- Keywords
- ADHD, Adults, Treatment, Rhodiola
- Medical subject headings
- Attention Deficit Disorder with Hyperactivity
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
RhodiolaDrug
Also called Rhodiola rosea
Rhodiola rosea 800mg
PlaceboDrug
Also called Placebo pill
innocuous pill manufactured to mimic Rhodiola
| Study group | Role | What they receive |
|---|---|---|
| Rhodiola | Experimental | Rhodiola rosea 800mg single dose Receives: Drug: Rhodiola |
| Placebo | Placebo comparator | placebo 800mg single dose Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Stop Signal Task
Change from baseline attention 4 hours after a single dose of Rhodiola 800mg or placebo
Measured: Baseline and 4 hours
Secondary outcomes (1)
Change in Wechsler Adult Intelligence Scale (WAIS) - Digit Span subtest
Change from baseline attention 4 hours after a single dose of Rhodiola 800mg or placebo
Measured: Baseline and 4 hours
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted13 Apr 2016 (estimated)
- Study startApr 2016
- Primary completionMar 2021 (estimated)
- Study completionMar 2021 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (12)Papers the sponsor has linked to this study.
- Other trials for Attention Deficit Hyperactivity DisorderStudies of the same condition, open and under way.
- More trials run by Hospital de Clinicas de Porto AlegreThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 60 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Hospital de Clinicas de Porto Alegre
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Eugenio Grevet, PhD, Principal investigator, Hosptital de Clínicas de Porto Alegre
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02737033
- Sponsor's protocol ID
- 150426
- Status last verified
- May 2019
- First submitted
- 7 Mar 2016
- Last updated
- 29 May 2019
- Results posted
- No
- Data monitoring committee
- No
- Individual data sharing
- Undecided
Publications
Seixas M, Weiss M, Muller U. Systematic review of national and international guidelines on attention-deficit hyperactivity disorder. J Psychopharmacol. 2012 Jun;26(6):753-65. doi: 10.1177/0269881111412095. Epub 2011 Sep 24.
PubMed 21948938Meszaros A, Czobor P, Balint S, Komlosi S, Simon V, Bitter I. Pharmacotherapy of adult attention deficit hyperactivity disorder (ADHD): a meta-analysis. Int J Neuropsychopharmacol. 2009 Sep;12(8):1137-47. doi: 10.1017/S1461145709990198. Epub 2009 Jul 7.
PubMed 19580697Iovieno N, Dalton ED, Fava M, Mischoulon D. Second-tier natural antidepressants: review and critique. J Affect Disord. 2011 May;130(3):343-57. doi: 10.1016/j.jad.2010.06.010. Epub 2010 Jun 26.
PubMed 20579741Panossian A, Wikman G, Sarris J. Rosenroot (Rhodiola rosea): traditional use, chemical composition, pharmacology and clinical efficacy. Phytomedicine. 2010 Jun;17(7):481-93. doi: 10.1016/j.phymed.2010.02.002. Epub 2010 Apr 7.
PubMed 20378318Hung SK, Perry R, Ernst E. The effectiveness and efficacy of Rhodiola rosea L.: a systematic review of randomized clinical trials. Phytomedicine. 2011 Feb 15;18(4):235-44. doi: 10.1016/j.phymed.2010.08.014. Epub 2010 Oct 30.
PubMed 21036578Darbinyan V, Kteyan A, Panossian A, Gabrielian E, Wikman G, Wagner H. Rhodiola rosea in stress induced fatigue--a double blind cross-over study of a standardized extract SHR-5 with a repeated low-dose regimen on the mental performance of healthy physicians during night duty. Phytomedicine. 2000 Oct;7(5):365-71. doi: 10.1016/S0944-7113(00)80055-0.
PubMed 11081987De Bock K, Eijnde BO, Ramaekers M, Hespel P. Acute Rhodiola rosea intake can improve endurance exercise performance. Int J Sport Nutr Exerc Metab. 2004 Jun;14(3):298-307. doi: 10.1123/ijsnem.14.3.298.
PubMed 15256690Shevtsov VA, Zholus BI, Shervarly VI, Vol'skij VB, Korovin YP, Khristich MP, Roslyakova NA, Wikman G. A randomized trial of two different doses of a SHR-5 Rhodiola rosea extract versus placebo and control of capacity for mental work. Phytomedicine. 2003 Mar;10(2-3):95-105. doi: 10.1078/094471103321659780.
PubMed 12725561Spasov AA, Wikman GK, Mandrikov VB, Mironova IA, Neumoin VV. A double-blind, placebo-controlled pilot study of the stimulating and adaptogenic effect of Rhodiola rosea SHR-5 extract on the fatigue of students caused by stress during an examination period with a repeated low-dose regimen. Phytomedicine. 2000 Apr;7(2):85-9. doi: 10.1016/S0944-7113(00)80078-1.
PubMed 10839209Olsson EM, von Scheele B, Panossian AG. A randomised, double-blind, placebo-controlled, parallel-group study of the standardised extract shr-5 of the roots of Rhodiola rosea in the treatment of subjects with stress-related fatigue. Planta Med. 2009 Feb;75(2):105-12. doi: 10.1055/s-0028-1088346. Epub 2008 Nov 18.
PubMed 19016404Logan GD, Cowan WB, Davis KA. On the ability to inhibit simple and choice reaction time responses: a model and a method. J Exp Psychol Hum Percept Perform. 1984 Apr;10(2):276-91. doi: 10.1037//0096-1523.10.2.276.
PubMed 6232345Mackin RS, Horner MD. Relationship of the Wender Utah Rating Scale to objective measures of attention. Compr Psychiatry. 2005 Nov-Dec;46(6):468-71. doi: 10.1016/j.comppsych.2005.03.004.
PubMed 16275215
Study at a glance
From the registry record, last updated by the sponsor on 29 May 2019. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of 800mg of Rhodiola Rosea in Attention in Adults With Attention-Deficit/Hyperactivity Disorder
- ClinicalTrials.gov ID
- NCT02737033
- Acronym / sponsor ID
- 150426
- Conditions
- Attention Deficit Hyperactivity Disorder
- Keywords
- ADHD, Adults, Treatment, Rhodiola
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Unknown status
- Enrolment
- 60 participants (estimated)
- Lead sponsor
- Hospital de Clinicas de Porto AlegreUniversity, hospital or other
- Study start
- Apr 2016 (actual)
- Primary completion
- Mar 2021 (estimated)
- Study completion
- Mar 2021 (estimated)
- First posted
- 13 Apr 2016 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study evaluates the use of Rhodiola rosea in the attention of adults with Attention Deficit/Hyperactivity Disorder (ADHD). Half of participants will receive Rhodiola rosea 800mg, while the other half will receive 800mg of placebo.
Detailed description
The evaluation of new therapies in adults with Attention Deficit/Hyperactivity Disorder (ADHD) may be clinically useful. Rhodiola rosea is an herbal medicine used for centuries in various medical conditions. Many randomized controlled trials have evaluated its usefulness in stress and fatigue. There were benefits in attention in some of these studies. Mild side effects and beneficial antioxidant properties make reasonable an assessment of its potential benefits in adults with ADHD. To our knowledge, Rhodiola rosea has never been studied in adults with ADHD.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Rhodiola | Experimental | Drug: RhodiolaRhodiola rosea 800mg single dose |
| Placebo | Placebo comparator | Drug: Placeboplacebo 800mg single dose |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- Fulfillment of Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, (DSM-5) diagnostic criteria for ADHD in Adults
- Intelligence Quotient (IQ) above 70
- Eligibility to Rhodiola rosea
Key exclusion criteria (11 listed)
- clinical contraindication to Rhodiola rosea
- any unstable chronic illness without proper treatment (hypertension, heart, kidney or liver disease, etc)
- any significant neurological disease (delirium, dementia, epilepsy, AIDS, head trauma, multiple sclerosis, stroke, etc)
- unstable psychiatric comorbidities requiring immediate treatment (risk of suicide, current Substance Use Disorder, etc.)
- pregnant, nursing or absence of reliable contraception
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| RhodiolaAlso: Rhodiola roseaRhodiola rosea 800mg | Drug | Rhodiola |
| PlaceboAlso: Placebo pillinnocuous pill manufactured to mimic Rhodiola | Drug | Placebo |
Primary outcome
Change in Stop Signal Task
Time frame: Baseline and 4 hours
Change from baseline attention 4 hours after a single dose of Rhodiola 800mg or placebo
1 secondary outcome
Change in Wechsler Adult Intelligence Scale (WAIS) - Digit Span subtest
Time frame: Baseline and 4 hours
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 May 2019.
- Background: PubMed 21948938Seixas M, Weiss M, Muller U. Systematic review of national and international guidelines on attention-deficit hyperactivity disorder. J Psychopharmacol. 2012 Jun;26(6):753-65. doi: 10.1177/0269881111412095. Epub 2011 Sep 24.
- Background: PubMed 19580697Meszaros A, Czobor P, Balint S, Komlosi S, Simon V, Bitter I. Pharmacotherapy of adult attention deficit hyperactivity disorder (ADHD): a meta-analysis. Int J Neuropsychopharmacol. 2009 Sep;12(8):1137-47. doi: 10.1017/S1461145709990198. Epub 2009 Jul 7.
- Background: PubMed 20579741Iovieno N, Dalton ED, Fava M, Mischoulon D. Second-tier natural antidepressants: review and critique. J Affect Disord. 2011 May;130(3):343-57. doi: 10.1016/j.jad.2010.06.010. Epub 2010 Jun 26.
- Background: PubMed 20378318Panossian A, Wikman G, Sarris J. Rosenroot (Rhodiola rosea): traditional use, chemical composition, pharmacology and clinical efficacy. Phytomedicine. 2010 Jun;17(7):481-93. doi: 10.1016/j.phymed.2010.02.002. Epub 2010 Apr 7.
- Background: PubMed 21036578Hung SK, Perry R, Ernst E. The effectiveness and efficacy of Rhodiola rosea L.: a systematic review of randomized clinical trials. Phytomedicine. 2011 Feb 15;18(4):235-44. doi: 10.1016/j.phymed.2010.08.014. Epub 2010 Oct 30.
- Background: PubMed 11081987Darbinyan V, Kteyan A, Panossian A, Gabrielian E, Wikman G, Wagner H. Rhodiola rosea in stress induced fatigue--a double blind cross-over study of a standardized extract SHR-5 with a repeated low-dose regimen on the mental performance of healthy physicians during night duty. Phytomedicine. 2000 Oct;7(5):365-71. doi: 10.1016/S0944-7113(00)80055-0.
- Background: PubMed 15256690De Bock K, Eijnde BO, Ramaekers M, Hespel P. Acute Rhodiola rosea intake can improve endurance exercise performance. Int J Sport Nutr Exerc Metab. 2004 Jun;14(3):298-307. doi: 10.1123/ijsnem.14.3.298.
- Background: PubMed 12725561Shevtsov VA, Zholus BI, Shervarly VI, Vol'skij VB, Korovin YP, Khristich MP, Roslyakova NA, Wikman G. A randomized trial of two different doses of a SHR-5 Rhodiola rosea extract versus placebo and control of capacity for mental work. Phytomedicine. 2003 Mar;10(2-3):95-105. doi: 10.1078/094471103321659780.
- Background: PubMed 10839209Spasov AA, Wikman GK, Mandrikov VB, Mironova IA, Neumoin VV. A double-blind, placebo-controlled pilot study of the stimulating and adaptogenic effect of Rhodiola rosea SHR-5 extract on the fatigue of students caused by stress during an examination period with a repeated low-dose regimen. Phytomedicine. 2000 Apr;7(2):85-9. doi: 10.1016/S0944-7113(00)80078-1.
- Background: PubMed 19016404Olsson EM, von Scheele B, Panossian AG. A randomised, double-blind, placebo-controlled, parallel-group study of the standardised extract shr-5 of the roots of Rhodiola rosea in the treatment of subjects with stress-related fatigue. Planta Med. 2009 Feb;75(2):105-12. doi: 10.1055/s-0028-1088346. Epub 2008 Nov 18.
- Background: PubMed 6232345Logan GD, Cowan WB, Davis KA. On the ability to inhibit simple and choice reaction time responses: a model and a method. J Exp Psychol Hum Percept Perform. 1984 Apr;10(2):276-91. doi: 10.1037//0096-1523.10.2.276.
- Background: PubMed 16275215Mackin RS, Horner MD. Relationship of the Wender Utah Rating Scale to objective measures of attention. Compr Psychiatry. 2005 Nov-Dec;46(6):468-71. doi: 10.1016/j.comppsych.2005.03.004.
- Individual participant dataSharing planned: Undecided
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Eugenio Grevet, PhD principal investigator
Hosptital de Clínicas de Porto Alegre
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing Rhodiola in people with Attention Deficit Hyperactivity Disorder, run by Hospital de Clinicas de Porto Alegre at 1 site in Brazil.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 11 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: status not confirmed, as of the sponsor's last update on 29 May 2019. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Brazil. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
Contact Eugenio Grevet, PhD (55 51 3359-8094, ehgrevet@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Stop Signal Task (time frame: Baseline and 4 hours). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02737033, which also lists 12 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 May 2019.