Imuran (azathioprine) Tablets and Injection”. In this open-label trial, 443 subjects already on an antiviral regimen containing immediate-release VIRAMUNE 200 mg twice daily with HIV-1 RNA less than 50 copies per mL were randomized in a 2:1 ratio to VIRAMUNE XR 400 mg once daily or immediate-release VIRAMUNE 200 mg twice daily. Anesthesiology 2011; 115: 1291-8. Skin treated with tretinoin cream may be more vulnerable to these extremes. Be sure you have ready at all times another kind of birth control (such as condoms or spermicide), to use as a back-up in case you miss pills. Baclofen, at standard dosing, does not produce euphoria or other pleasant effects, does not possess addictive properties, and has not been associated with any degree of drug craving.