Then don't smoke a joint. The standard sized joints that NIDA hands out for research are 0.7 grams. The amount needed to get this anti-inflammatory effect is roughly .02 grams, in other words 1 / 35th of a joint. There are also two different ways that you can get the same health benefits without any psychoactive side effects. First, you can get high-CBD weed. CBD is a non-psychoactive cannabinoid that basically cancels out the effects of THC. Second, if you juice raw cannabis it is basically non-psychoactive, because without heating or drying it the THCA never gets decarboxylated into THC. Here are a couple articles about this:
"The standard sized joints that NIDA hands out for research are 0.7 grams."
Really? That seems like a lot. I was a sporadic recreational smoker about 15 years ago, we bought marihuana one gram at a time and that gram would last us a weekend. Maybe the difference is in THC content; I bought in the Netherlands where quality is generally high and THC concentrations relatively high in higher-end varieties, from what I understand (I don't have experience with foreign varieties to compare it with). Then again, our usage customs are different from elsewhere in the world, too; we rolled joints out of tobacco and only sprinkled on some marihuana. When I told that to Americans they'd look at me as if I was crazy.