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J-Mill
30th April 2009, 03:42 PM
A comparison of the efficacy of topical tretinoin and low-dose oral isotretinoin in rosacea.

Ertl GA (http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=Search&Term=%22Ertl%20GA%22%5BAuthor%5D&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsP anel.Pubmed_DiscoveryPanel.Pubmed_RVAbstractPlus), Levine N (http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=Search&Term=%22Levine%20N%22%5BAuthor%5D&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsP anel.Pubmed_DiscoveryPanel.Pubmed_RVAbstractPlus), Kligman AM (http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=Search&Term=%22Kligman%20AM%22%5BAuthor%5D&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsP anel.Pubmed_DiscoveryPanel.Pubmed_RVAbstractPlus).

University of Arizona, Tucson.
BACKGROUND AND DESIGN: Twenty-two patients with severe or recalcitrant rosacea were divided into three treatment groups in a randomized, double-blind trial that compared low-dose oral isotretinoin (10 mg/d), topically applied tretinoin (0.025% cream), and the combined use of both isotretinoin and tretinoin. For the first 16 weeks of the trial, subjects received one of these three trial regimens. For the final 16 weeks, isotretinoin was withheld while tretinoin cream or a placebo cream was continued. RESULTS: Twenty subjects completed the trial. Each treatment produced therapeutic benefits with regard to the number of papules and pustules and erythema. Treatment with oral isotretinoin appeared to give a more rapid onset of improvement, but there were no differences between the groups after 16 weeks. This level of improvement continued during the succeeding 16 weeks of observation whether the subjects used the tretinoin or the placebo cream. Adverse events were minimal and well tolerated in all groups. CONCLUSIONS: Low-dose oral isotretinoin and topical tretinoin cream therapy appear to be beneficial in the treatment of severe or recalcitrant rosacea. No additive benefit is noted with the combined use of these two modalities.

mattdog323
1st May 2009, 05:40 AM
[QUOTE=J-Mill;213637]A comparison of the efficacy of topical tretinoin and low-dose oral isotretinoin in rosacea.

Twenty subjects completed the trial.

What do they base the numbers off 15/20?

I'm sure its all reasonable scientific data etc,

Its obviously hard to find more patents to take part in these studies but 20 people or 30 or 40 are clearly in conclusive results,

Studies need to be taken in there thousands to be conclusive,
Thanks for posting
Regards Matt

TheMediumDog
1st May 2009, 06:12 AM
This level of improvement continued during the succeeding 16 weeks of observation whether the subjects used the tretinoin or the placebo cream

Eh?huh:

J-Mill
1st May 2009, 01:48 PM
[QUOTE=J-Mill;213637]A comparison of the efficacy of topical tretinoin and low-dose oral isotretinoin in rosacea.

Twenty subjects completed the trial.

What do they base the numbers off 15/20?

I'm sure its all reasonable scientific data etc,

Its obviously hard to find more patents to take part in these studies but 20 people or 30 or 40 are clearly in conclusive results,

Studies need to be taken in there thousands to be conclusive,
Thanks for posting
Regards Matt

It is not necessarily a huge number of participants that validates a study. Scientifically if proper controls were used, then a small number is still statistically significant. It is not conclusive however without repetition.

In science it is the ability to repeat a study and obtain the same results that makes it conclusive. Instead of doing one study of 1000 people,it would be more conclusive to do 20 studies of 50 people.

Eh?huh:

They gave the subjects initially either oral isotretinoin or a 0.025% tretinoin cream or both for the first 16 weeks of the study. For the next 16 weeks they withdrew the oral isotretinoin and subjects used only the placebo cream or the topical tretinoin, and all continued to improve. The suggestion I suppose is that 4 months of treatment with oral isotretinoin or topical tretinoin is sufficient to provide lasting and continued improvement for at least the next 4 months regardless of whether treatment is continued. Also that mixing the two treatments doesn't provide any added benefit.

valby
3rd May 2009, 11:21 AM
Hmm this is interesting. Still perplexes me that intolerances were minimal with the retinoids. I can only tolerate such a low dose of accutane.....