I personally have never heard of such a thing, and I can’t imagine why it would. However, I was told in a health store that they swore by the remedy of applying castor oil to warts with good effect. If you were to extract cannabis into an oil (as it commonly is) perhaps this might work in a similar way.
However, if the castor oil works, you might wonder if its the oil and not the cannabis that is having the effect.
Sorry to not have a more informed answer. Perhaps one of the doctors does.
As it turns out there are CB1 and CB2 receptors found throughout human skin. Topicals are also a very effective way for cannabinoids to get into skin cells that may need them the most. As it turns out the cannabinoids do really have an effect on skin irritations, which may include warts. Using cannabis on skin for burns or wounds has been happening for thousands of years and i am a huge proponent of using it this way. So to answer your question, you will find a lot of references for cannabis use as a topical for ‘skin abnormalities’ which include warts as well as something like a melanoma, albeit that is far more serious.
The question I would have is which topical would have the best impact or create change for a wart. Also, a plantars wart is much more difficult to treat than other types of warts. You will find many references to people using cannabis oil or hemp oil on their warts and that they go away.
This represents my opinion and I am not a doctor. I hope this helps!
Cannabis has never been shown to kill a virus. There have been a few studies that "suggest" cannabis can effect the HIV virus. But since warts are caused by many different types and strains of virus, it is highly doubtful that cannabis can get rid of warts.
There are many other components in cannabis ointments, cream and oils that may aid in removing warts, but by the same token, warts have been "shown" to be cured by using duct tape as well! Remember that warts are contagious and can spread. So using a over the counter method can be tried first. If not successful, seeing a dermatologist if they grow large, or if it is a plantar wart on your foot and painful, may be the next step.
Perry Solomon, MD