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Can the antibiotic Doxycycline help control the complications (dyskinesias) of levodopa treatment in patients with Parkinson's Disease?

Pilot study to verify the safety and efficacy of Doxycycline in the treatment of levodopa-induced dyskinesias in patients with Parkinson's disease

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
REBEC
Registry ID
RBR-1047fwbf
Enrollment
Unknown
Registered
2022-05-12
Start date
2021-03-01
Completion date
Unknown
Last updated
2025-10-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Drug induced chorea

Interventions

This is an open-label, uncontrolled, single arm trial in which we will use doxycycline (200mg/day orally) for 12 weeks in 10 patients diagnosed with Parkinson's disease to see if the treatment can red
SP4.022.238.359

Sponsors

Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo
Lead Sponsor
Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo
Collaborator

Eligibility

Age
18 Years to No maximum

Inclusion criteria

Inclusion criteria: Patients 18 years of age or older; diagnosed with Parkinson's disease according to the United Kingdon Parkinson's Disease Society Brain Bank clinical diagnostic criteria; presenting at the initial evaluation with at least some functional impact dyskinesias (score higer than1 on item 4. 2 of the Movement Disorder Society - Unified Parkinson's Disease Rating Scale (MDS-UPDRS); who are using levodopa at least three times a day; and who can keep doses of antiparkinsonian medications unchanged for at least four weeks prior to screening and during study participation.

Exclusion criteria

Exclusion criteria: Diagnosis of atypical or secondary parkinsonism; treatment of any experimental drug or other intervention within 90 days prior to screening or baseline assessment; presence of moderate or severe psychotic symptoms (score greater than 2 on item 1. 2 of the Movement Disorders Society's Unified Scale for Assessment of Parkinson`s disease; diagnosis of dementia according to the Movement Disorders Society diagnostic criteria; suffering from serious systemic conditions (infections, malignancies, chronic kidney or liver disease); pregnancy or lactation; history of hypersensitivity or allergic reaction to tetracyclines; absence of clinical dyskinetic movements at baseline assessment.

Design outcomes

Primary

MeasureTime frame
It is expected to observe a significant reduction in dyskinesia clinical assessment scores according to the Unified Dyskinesia Rating Scale between the baseline assessment and the assessment after 12 weeks of treatment.

Secondary

MeasureTime frame
It is expected to observe a significant reduction in the time with disabling dyskinesias in the motor status diary between the baseline assessment and the assessment after 12 weeks of treatment.

Countries

Brazil

Contacts

Public ContactVitor Tumas

Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo

tumasv@fmrp.usp.br+55 16 36022436

Outcome results

None listed

Source: REBEC (via WHO ICTRP) · Data processed: Feb 9, 2026