Enlarge (credit: Diamond Shruumz)

Cases of illnesses linked to microdosing candies have more than doubled, with reports of seizures and the need for intubation, mechanical ventilation, and intensive care stays. But, there remains no recall of the products—microdosing chocolates, gummies, and candy cones by Diamond Shruumz—linked to the severe and life-threatening illnesses. In the latest update from the Food and Drug Administration late Tuesday, the agency said that it "has been in contact with the firm about a possible voluntary recall, but these discussions are still ongoing."

In the update, the FDA reported 26 cases across 16 states, up from 12 cases in eight states last week. Of the 26 reported cases, 25 sought medical care and 16 were hospitalized. No deaths have been reported.

Last week, the Centers for Disease Control and Prevention released a health alert about the candies. The agency noted that as of June 11, the people sickened after eating Diamond Shruumz candies presented to health care providers with a host of severe symptoms. Those include: central nervous system depression with sedation, seizures, muscle rigidity, clonus (abnormal reflex responses), tremor, abnormal heart rate (bradycardia or tachycardia), abnormal blood pressure (hypotension or hypertension), gastrointestinal effects (nausea, vomiting, or abdominal pain), skin flushing, diaphoresis (excessive sweating), and metabolic acidosis with increased anion gap (an acid-based disorder linked to poisonings).

Enlarge / A Diamond Shruumz chocolate bar, which come in a variety of flavors. (credit: diamondshruumz.com)

Various federal and state health officials are sounding the alarm on Diamond Shruumz-brand Microdosing Chocolate Bars. The candy, said to be infused with mushrooms, has been linked to severe illnesses, including seizures, loss of consciousness, confusion, sleepiness, agitation, abnormal heart rates, hyper/hypotension, nausea, and vomiting, according to an outbreak alert released by the Food and Drug Administration on Friday.

So far, eight people across four states have been sickened—four in Arizona, two in Indiana, one in Nevada, and one in Pennsylvania, the FDA reported. Of the eight, six have been hospitalized.

"We are urging the public to use extreme caution due to the very serious effects of these products," Maureen Roland, director of the Banner Poison and Drug Information Center in Phoenix, said in a press release earlier this week.