Hi. Thanks for the query. As such, allergies are often unrelated & they can occur to various different types of substances/materials totally unrelated to one another. As such there is NO apparent connection between peanut & marijuana & you should not be having any difficulty with marijuana. But there is no certain/reliable way to tell unless a person is actually suffers from allergic reaction after exposure to a certain substance. Since you know that marijuana smoking is illegal & can be harmful to health even otherwise also; hence better off staying away from marijuana in your own interest. Good Luck