Melissa M Guaderrama

  • Citations Per Year
Learn More
Use of drugs of abuse in combination is common among recreational users and addicts. The combination of a psychomotor stimulant with an opiate, known as a 'speedball,' reportedly produces greater effects than either drug alone and has been responsible for numerous deaths. Historically, the most popular speedball combination is that of cocaine and heroin.(More)
There has been renewed interest in salivary alpha-amylase (sAA), a surrogate marker of autonomic/sympathetic activity, in biosocial research on stress vulnerability, reactivity, and recovery. This study explored the impact of saliva flow rate on sAA measurement by examining the influence of (1) the technique used to collect oral fluid-synthetic swab, cotton(More)
The present study examined plasma arginine vasopressin (AVP) levels in 18 smokers (10 men, 8 women) and in 22 non-smokers (12 men, 10 women). Non-smokers came to the laboratory once, whereas smokers came twice: while smoking freely and following 24-hr abstinence. Plasma was collected for AVP assessment; salivary cotinine and expired carbon monoxide levels(More)
  • 1