The misuse of buprenorphine and a buprenorphine-naloxone combination in Wellington, New Zealand.

Two surveys of 12 months duration were undertaken on opioid users presenting to the Wellington Alcohol and Drug Centre before and after the introduction of a combination buprenorphine 0.2 mg-naloxone 0.17 mg tablet (Bu-Nx), which was launched in 1991 in the hope of reducing intravenous misuse. There was considerable intravenous (i.v.) misuse of buprenorphine 0.2 mg tablets (Bu) in 1990 with self-reports of misuse in 81% of the patients over the 4 weeks prior to presentation, and 65% of the patients had buprenorphine in their urine. In the repeat survey 57% reported misuse of the Bu-Nx combination over the previous 4 weeks, and 43% had buprenorphine +/- naloxone detected in their urine. There was a reduction in the street price of Bu-Nx. One-third of the patients who used Bu-Nx i.v. reported instances of withdrawal symptoms, and subjectively the drug was less attractive to misusers. The combination product may have less misuse potential than buprenorphine alone, but it remains a preparation, in the dosages employed, that is intravenously misused.

Mortality of intravenous drug users: attenders of the Wellington Drug Clinic, 1972-89.

A mortality study of 997 patients registered for treatment at the Wellington Drug Clinic since 1971 was undertaken by examining the New Zealand death records. Sixty-seven known deaths were reported. The mortality rates were increased 11.5 times under the age of 25 years, and 5.8 times for age 25-34 years, but not significantly thereafter. There were 7 deaths from trauma, 8 from suicide, and 28 accidental deaths. Myocarditis was the cause of death in four cases. In the 28 drug-related deaths the principle drugs incriminated were dextropropoxyphene, barbiturates, chloral hydrate, methadone and other opiates. Twenty-one deaths were due to unrelated diseases. It was considered important to document mortality in intravenous drug users in the 'pre-HIV' era. This study demonstrates quite low death rates from opioid drugs themselves.

Wellington coroner autopsy cases 1970-89: acute deaths due to drugs, alcohol and poisons.

Coronal autopsy reports attributing deaths to drugs or poisonings were examined for the period 1970-89. There were 239 deaths of which 69% were suicide, 23% were accidental, 4% therapeutic misadventure, and 4% of uncertain category. 10.4% of deaths were due solely to alcohol and alcohol was found in another 13% of deaths from other drugs and poisons [corrected]. Twenty-seven percent of deaths were attributed to carbon monoxide poisoning. Five percent of deaths were due to poisons. Prescription drugs were the cause of deaths in 54% with the principle drug classes being opioids (14%), tricyclic antidepressants (12%), barbiturates (11%), hypnosedatives (8%). Prescribers need to be aware of the interactions of such drugs with alcohol, and to consider safer alternative drugs for those at risk of overdose or drug misuse.

The Relationship Between Tobacco Yield and Time of Infection with Meloidogyne javanica.

Yield of tobacco was related to the amount of infection by Meloidogyne javanica during the first month after transplanting. Six nematicidal treatments significantly reduced infection during this period and subsequently increased yield. However, during the second month after transplanting, infection in plots treated with O-ethyl S,S-dipropyl phosphorodithioate (V-C 9-104) and a mixture of 80% chlorinated C hydrocarbons + 20% methyl isothioeyanate (DD + MENCS) was not significantly different from infection in untreated plots. After 3 months, root-knot indices in plots treated with V-C 9-104, DD + MENCS, O,O-diethyl O-[p-(methylsulfinyl) phenyl] phosphorothioate (B-25141), and 1,3-dichloropropene, 1,2-dichloropropane (DD) were not significantly different from those in untreated plots; reduced infection was present only in plots treated with ethylene dibromide (EDB) and 2-methyl-2 (methylthio) propionaldehyde O-(methylcarbamoyl) oxime (aldicarb). At the end of harvest (4 months after transplanting), root-knot indices in all plots were essentially equal.