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Author Topic: Safety of taking Astaxanthin with Efavirenz  (Read 1655 times)

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Offline andrewpiccadilly

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Safety of taking Astaxanthin with Efavirenz
« on: June 07, 2010, 11:15:34 AM »
My HIV has been well controlled on Sustiva and Truvada for a number of years now. I have recently researched the health benefits of astaxanthin as a powerful anti-oxidant. Several research papers evidence its role in reducing cancer risk, protecting against UV skin damage and improving skin appearance, reducing muscle and joint inflammation etc etc. I started taking this suplement a week ago and have felt that the symptoms of efavirenz (nightmares, feeling hazy) have returned. Having researched possible drug interactions there appears to be proof that astaxanthin induces the P450 enzyme system involved in breaking down efavirenz in the liver of rats. However I cant see proof that this is the case in humans - the only paper was with in vitro human hepatocellular tissue. I would be grateful if someone could let me know if there is definitive evidence that astaxanthin induces P450 in humans and if this is dose related ( I have been taking 6 capsules = 24mg / day). I would like to continue taking ataxanthin because of its benefits but dont want to risk upsetting my HIV control. Also - I cant understand if there is an increase in P450 why I would experience more symptoms of efavirenz as I would have thought that it would be broken down quicker and therefore have less symptoms - unless it is the matabolites from the breakdown of efavirenz that cause the symptoms.? Any advice would be very much appreciated. Thanks. Andrew

Offline newt

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Re: Safety of taking Astaxanthin with Efavirenz
« Reply #1 on: June 07, 2010, 06:23:11 PM »
Almost certainly this supplement in affects the CYP450 pathway in humans given strong results in animals. There are no human studies but it is a sound extrapolation from the animal studies.

Since there are no human studies, there's no way to establish whether this is dose related or not, except to try a lower dose and see
"The object is to be a well patient, not a good patient"


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