I'm not sure but I found this:
7.2 Toxicity
7.2.1 Human data
7.2.1.1 Adults
Toxic effects vary from individual to individual (Gosselin et al., 1984). For example, ingestion of 6 grams has led to significant toxicity or no symptoms at all (Gidron and Leurer, 1956).
The mean lethal dose in nonsensitive adults may lie between 5 and 15g (Gosselin et al., 1984).
/SIGNS AND SYMPTOMS/ Chronic abuse of mothballs containing naphtalene and paradichlorobenzene was reported to cause peripheral neuropathy and chronic renal failure. Chronic sniffing of naphthalene containing mothballs can cause liver necrosis.
[IPCS; Poisons Information Monograph 363: Naphthalene. (Date of last update: September 2000). Available from, as of January 22, 2014:
http://www.inchem.org/pages/pims.html PEER REVIEWED
/SIGNS AND SYMPTOMS/ Symptomatology: Ingestion:
- Abdominal cramps with nausea, vomiting, and diarrhea.
- Headache, profuse perspiration, listlessness, confusion.
- In severe poisoning, coma with or without convulsions.
- Irritation of the urinary bladder ... Signs & symptoms: urgency, dysuria, & the passage of a brown or black urine with or without albumin & casts. ...
- Acute intravascular hemolysis is the most characteristic sign. ...
It begins on the 3rd day & is accompanied by anemia, leukocytosis, fever, hemoglobinuria, jaundice, renal insufficiency, and sometimes, disturbances in liver function.
6. In the absence of adequate supportive treatment, death may result from acute renal failure in adults or kernicterus in young infants.
[Gosselin, R.E., R.P. Smith, H.C. Hodge. Clinical Toxicology of Commercial Products. 5th ed. Baltimore: Williams and Wilkins, 1984., p. III-309]
PEER REVIEWED
/SIGNS AND SYMPTOMS/ The symptoms that developed after naphthalene intake included nausea, vomiting, and convulsions after one to several days, often followed by diarrhea.
Other symptoms were disturbances of consciousness, lethargy, ataxia, and, in severe cases, coma and hemiplegia.
Mild to severe jaundice can also occur; in one fatal case of poisoning, patchy liver necrosis was reported.
[WHO/FAO; Environmental Health Criteria Document No. 202: Selected non-Heterocyclic Polycyclic Aromatic Hydrocarbons (1988). Available from, as of January 23, 2013:
http://www.inchem.org/pages/ehc.html PEER REVIEWED
In conclusion, I would advise against it because "Among those who survived the acute hematotoxicity, life-threatening acute renal failure secondary to renal blockade ensue."
It sounds like a painful method with stages of suffering and you will most likely be "saved" unless you have a lot of undisturbed time and are prepared to wait through kidney failure. Kinda of like overdosing on painkillers.
Good luck though, with whatever you do.