I bet this isn't what you were expecting. Check out this article. Common pain killers increase muscle strength and mass. Who would have known?
its not conclusive yet but this study looks pretty good. Here's the article
Painkillers Boost Muscle Mass Among Weight-Traini... ( Daily dose of ibuprofen acetaminophen...)
Daily dose of ibuprofen, acetaminophen upped growth by 40% to 60%, study found
15- to 20-minute sessions three times per week -- was set at a level known by the researchers to prompt significant muscle mass and strength growth in a participant's quadriceps muscles...the participants were randomly divided into an acetaminophen group, an ibuprofen group or a placebo group.
The two drugs were consumed at recommended daily dosage levels, as noted on current over-the-counter packaging.
To the research team's surprise, an analysis of muscle tissue samples taken before and after revealed that while the placebo group experienced a 7 percent growth in muscle mass and strength, those taking either acetaminophen or ibuprofen experienced an even greater gain -- 40 percent to 60 percent more.
its not conclusive yet but this study looks pretty good. Here's the article
Painkillers Boost Muscle Mass Among Weight-Traini... ( Daily dose of ibuprofen acetaminophen...)