Dr. Nicholas Nissen

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PHOTO: MDMA or Ecstasy pills are seen pictured in this stock photo. — STOCK PHOTO/Makhbubakhon Ismatova/Getty Images

FDA advisers vote against recommending approval of MDMA as treatment for PTSD

PHOTO: Dr. M. Rameen "Dr. G" Ghorieshi treats patient Joel W., 50, during a visit to Palo Alto Mind Body in Palo Alto, Calif., March 13, 2019. — Yalonda M. James/San Francisco Chronicle via AP, FILE

Closures of ketamine clinics leave some patients scrambling for treatment

PHOTO: In this May 24, 2019, file photo, a vendor bag of psilocybin mushrooms is shown at a cannabis marketplace in Los Angeles. — Richard Vogel/AP, FILE

Australia will allow prescription MDMA and magic mushrooms for some people with mental illness

PHOTO: A doctor talks to a patient in this undated stock photo. — STOCK PHOTO/Getty Images

Americans avoiding health care in pandemic over cost concerns

PHOTO: A marijuana cigarette is prepared in a public square in Guadalajara, Mexico, Aug. 12, 2021. — Leonardo Alvarez Hernandez/Getty Images, FILE

Young adults dropping alcohol for marijuana and hallucinogens, survey finds

PHOTO: A Ketamine IV is prepared at a clinic, March 13, 2019, in Palo Alto, Calif. — Yalonda M. James/San Francisco Chronicle via Getty Images

Doctors treating depression see promise in ketamine, a cheap drug already approved for anesthesia

PHOTO: A pill stands on a reflective surface illuminated by multi-colored lights in an undated stock image. — STOCK IMAGE/Aitor Diago/Getty Images

How MDMA-assisted therapy could treat PTSD in ways current therapy can't

PHOTO: A man cries into his hands on a bridge in this stock photo. — STOCK PHOTO/Getty Images

Despite increase in depression during pandemic, suicides may have decreased: Studies

PHOTO: Prescription opioid drugs to control pain lay scattered on a patient's nightstand, Feb. 16, 2021, in Canton, Ga. — Robin Rayne/ZUMA Press

Dying of loneliness: What COVID-19 has taught us about the opioid epidemic

PHOTO: People wait in line to get their COVID-19 vaccine at a vaccination site set up in a park in the Lincoln Heights neighborhood of Los Angeles, Feb. 9, 2021. — Jae C. Hong/AP

Americans' willingness to get COVID-19 vaccines reaches record high: Poll

PHOTO: Family members embrace in a cemetery near the grave of a loved one who died of a heroin overdose. — John Moore/Getty Images, FILE

Opioid overdoses 29% higher in 2020 than before the pandemic: Study

PHOTO: Supporters of President Donald Trump clash with police officers in front of the Capitol Building in Washington, D.C., Jan. 6, 2021. — Stephanie Keith/Reuters

The mental toll of the Capitol siege on the American psyche

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