Is there natural form of antabuse (disulfiram)?

No. One other medicine, Flagyl (metronidazole), used for vaginal infections and other parasitic infections, has antabuse-like actions, so if people drink on it, they get nauseated. Some people of asian background naturally do not make enough of an enzyme that metabolizes alcohol (which is blocked by antabuse) so they get some of the same symptoms- - flushing, nausea, headache, dizziness.
Alcohol deterrent. Antabuse (disulfiram) or Disulfiram is a medication. There is no natural form. The dosage is 250-500mg daily. Contraindications are: pregnancy, add, hyoersensitivity, alcohol, psychoses and lactation (breast feeding).