Skip to main content

Validation Of Simple And Rapid HPLC Method For Determination Of Metronidazole In Dermatological Formulations

A rapid and simple method using an isocratic high-pressure liquid chromatography (HPLC) and UV detection for the determination of metronidazole in dermatological formulations is presented. Metronidazole samples were extracted with a solution composed of 60% methanol and 40% mobile phase by a procedure that can be completed in less than 10 min.

Subsequent separation and quantification was accomplished in less than 20 min using reversed-phase HPLC with isocratic elution with 0.01% trifluoroacetic acid/acetonitrile (85:15%, vol/vol). Validation experiments confirmed the precision and accuracy of the method.

When applied to a commercial metronidazole cream and gel formulation, recoveries of 100.4% for cream formulations and 102.3% for gel formulations were obtained. The method should facilitate studies of the formulation compatibility of metronidazole topical formulations with agents that may improve its clinical tolerability for treatment of rosacea.


"Validation of a simple and rapid HPLC method for determination of metronidazole in dermatological formulations"
Tashtoush BM, Jacobson EL, Jacobson MK
Drug Dev Ind Pharm. 2008 Aug ; 34(8): 840-4 (Hubmed.org)


Highlight :
Treatment Of Rosacea | Acne Rosacea Antibiotic

Popular posts from this blog

Helicobacter pylori and its eradication in rosacea

Rosacea is a common condition of unknown etiology usually accompanied by gastrointestinal symptoms and favorably responding to the treatment with antibiotics. This study was designed to examine the prevalence of gastric Helicobacter pylori (Hp) infection verified by 13C-UTB-test, CLO, Hp culture and serology (IgG) in patients with rosacea. Gastroduodenoscopy was combined with pentagastrin secretory test and antral and fundic biopsy samples were taken for histological evaluation (the Sydney system). Blood samples were also taken for the determination of plasma gastrin using RIA and plasma interleukin (IL)-8 and tumor necrosis factor alpha (TNFalpha) using ELISA. This study was performed in 60 patients, 31-72 year old, with visible papules and pustules associated with erythema and flushing on the face and on 60 age- and gender-matched patients without any skin diseases but with similar as in rosacea gastrointestinal symptoms but without endoscopic changes in gastroduodenal mucosa (non-...
Read more

Treatment Of Rosacea With Intense Pulsed Light

Rosacea is a common skin condition but the treatments currently available are not satisfactory. OBJECTIVES: To assess the efficacy of intense pulsed light (IPL) for treatment of stage I rosacea (flushing, erythema and telangiectasia). METHODS: Thirty-four patients were treated, 25 women and nine men, mean age 47 years. The treatment employed was IPL 515-1200 nm, with a 560 nm cut-off filter. The fluence range was 24-32 J cm(-2). Four treatments were administered on the face at 3-week intervals. Erythema values were measured at baseline and at the end of the treatment period on the cheeks and chin. Digital photographs were assessed by a consultant dermatologist on a 10-point visual analogue scale (VAS). Patients' assessments were also made using a 10-point VAS. Outcome measures were repeated 6 months after treatment. RESULTS: After four treatments the mean reduction of the erythema values was 39% on the cheeks (P The severity of rosacea was reduced on average by 3.5 points on the 10...
Read more

The effect of Cetaphil Gentle Skin Cleanser on the skin barrier of patients with rosacea

A good skin care regimen is a critical part of rosacea treatment ; however, care must be taken to choose nonirritating products because individuals with rosacea tend to have sensitive skin, and irritants can trigger a worsening of symptoms. This study examines the use of Cetaphil Gentle Skin Cleanser (a nonalkaline nonirritating cleanser) in patients with rosacea. To eliminate the confounding effects of various treatments, the cleanser was studied for a 2-week period in the absence of rosacea therapy following a 2-week washout period in patients with mild to moderate rosacea. During the washout period, patients were asked to cleanse twice daily with Dove Sensitive Skin Bar. During the 2-week study period, patients were monitored for skin barrier function through transepidermal water loss (TEWL) and corneometry; patients also were monitored for rosacea severity. Thirty patients were enrolled. No significant increase in TEWL was demonstrated at any point during the study, indicating t...
Read more