I have a heart murmur but i also smoke weed. does smoking weed have any effect (good or bad) on my heart murmur?

No: Well, saying you have a heart murmur doesn't mean anything and does not tell us your diagnosis. . A murmur is just a sound, but what is causing it is the important thing therefore, you have to ask your doctor what is causing your murmur. It may be innocent, meaning your heart is normal. As for weed, if you're healthy, then probably no direct effect on the murmur, good or bad.

As above: In addition smoking weed can cause symptoms similar to schizophrenia and i advise u to avoid it.