You should keep harmalas in the salt form, the best salt would be hydrochloride but other salts would be okay. The reason you should keep harmalas in their salt form is because salts are water-soluble, this means that if you are going to swallow harmalas you should keep it in the salt form. If you intend to vaporise it you must convert it to its freebase form, I would advise oral administration as opposed to inhalation. If you have harmalas salts, either dissolve them in water or another drinkable liquid or put them in gelatin capsules and swallow them.