Doc,long story short. Been on Sustiva a long time, doc does not think I should switch even though its been narrowed down as the cause of my gynecomastia. All my hormones test very normal and i am very lean and in good shape. Doc let me try a course of DHT gel (andractim) rubbed on pecs, but no results other than thinning hair (been off propecia since last Christmas, so thats been eleminated as the cause) Docs plan "B" is Tamoxifen, but I see nothing online of that helpign once you already have gyno. Some people on the bodybuilding sites say "Letrozole" is really my only hope to reverse some of the gyno. Have you heard of anyone else with this problem caused by Sustiva and what they did about it, or any other ideas? Tired of worrying about this and throwing money at the problem, with the only results being hair loss and acne. I am so afraid the gyno will be permanent if I do not fix it. I have already had the meds to a number on my face and arms and legs and butt, it would be nice to keep my "Rack" looking normal... Thanks, Al
Sustiva (efavirenz) has not been conclusively linked to gynecomastia. Certainly other drugs, such as Propecia, have. There are some rare case reports possibly linking Sustiva and gynecomastia. The exact mechanism of how this would occur remains unclear. Possible mechanisms include: (1) Efavirenz-mediated, estradiol-like effects and (2) immune restoration-like processes.
I should point out that the breast enlargement that has been linked to HAART (not specifically Efavirenz) is not true gynecomastia, but rather "pseudo-gynecomastia," due to deposition of fat tissue. It may occur as part of the fat redistribution syndrome (lipodystrophy). There is a report in the literature describing five cases of possible Sustiva-associated pseudo-gynecomastia, which regressed in all five cases after Sustiva was discontinued. In light of this report, if indeed the differential diagnosis for the underlying cause of your breast tissue enlargement has been limited (or at least significantly narrowed) to the possibility of Sustiva and if you have a number of good alternative HAART regimens to switch to, strong consideration could be given to a therapeutic trial off Sustiva. This is obviously a quality of life issue for you and quality of life must be a significant part of every treatment equation. If a switch is not possible or advisable due to your resistance profile, lack of tolerance to other antiretroviral agents or concern about drug-drug interactions, I would recommend you get a second opinion regarding your treatment options from an HIV-knowledgeable endocrinologist. Tamoxifen has been helpful in some cases of gynecomastia.
There is no doubt that gynecomastia or pseudo-gynecomastia in the setting of HIV disease and potent antiretroviral therapy can be very challenging from a diagnostic, therapeutic and quality of life perspective. Keep us posted. Your experience may well help others to keep their "rack intact!"