Effects of Doxycycline on Persistent Symptoms Post-neuroborreliosis

Linköping University (LiU)

Status: Completed

Conditions: Paresthesia; Radicular Pain; Cognitive Dysfunction; Fatigue; Paresis

Treatments: Drug: Doxycycline; Drug: Placebo

Study type: Interventional

Funder types: Other

Identifiers

NCT01205464

151:2004/25331

Details and patient eligibility

About

The aim of this randomised, double-blind crossover study was to determine whether Doxycycline has an impact on the persistent symptoms post-neuroborreliosis, through alterations in the immune response and whether such an effect could influence the clinical outcome.

Full description

Persistent symptoms after treatment of neuroborreliosis (NB) are not uncommon. There is currently no evidence for improvement of symptoms after repeated or prolonged antibiotic treatment. However, clinical observations have indicated that some patients improve during treatment with doxycycline (DOX), but regain the symptoms some time after completed treatment. This may be due to an immunomodulatory effect of the drug. The aim of this randomised, double-blind crossover study was to determine whether DOX has an impact on the persistent symptoms through alterations in the immune response and whether such an effect can influence the clinical outcome.

A total of 15 patients from South-East Sweden with previously adequately diagnosed NB with diverse persistent symptoms ≥6months after antibiotic treatment were randomised in a double-blind, crossover fashion to receive either DOX 200 mg or placebo (PBO) once daily for three weeks, followed by a wash-out period of six weeks and a further three-weeks treatment with either DOX 200 mg or PBO once daily for three weeks. The primary outcome measures were improvement of the persistent symptoms and physical and mental health, evaluated using the visual analogue scale (VAS), the 36-item Short-Form General Health Survey (SF-36) and through physical examination with special emphasis on neurologic status at the follow-up visits. Secondary outcome measures were changes in drug-induced antigen-stimulated and unstimulated cytokine responses.

Enrollment: 15 patients

Sex: All

Ages: 18 to 85 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• a history of adequately diagnosed and treated neuroborreliosis (presence of intrathecal borrelia-antibody production)
• persistence of symptoms (with debut in conjunction with neuroborreliosis) of typical character, such as headache, radiculitis, cognitive dysfunction, fatigue, mood disorders, paresthesia or paresis > 6 months post-treatment of neuroborreliosis

Exclusion criteria

• systemic immunosuppression (treatment with corticosteroids, cytostatics etc)
• ongoing infection at inclusion
• allergy against doxycycline
• pregnancy
• breast feeding
• psychiatric disease
• multiple sclerosis
• rheumatoid arthritis
• diabetes mellitus type 1 or II
• inflammatory systemic diseases
• liver ohc kidney dysfunction
• treatment with didanosine, quinapril, antacids
• malignancy

Trial design

Primary purpose: Basic Science

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Triple Blind

---

15 participants in 2 patient groups, including a placebo group

Doxycycline

Active Comparator group

Description:

Treatment with Capsule Doxycycline 200 mg, once daily, for 21 days.

Treatment:

Drug: Doxycycline

Sugar pill

Placebo Comparator group

Description:

Capsule Placebo, 200 mg, once daily, for 21 days.

Treatment:

Drug: Placebo