A Missouri mother has been charged in the death of her teenage daughter, who she allegedly administered a lethal dose of fentanyl after complaining of a toothache.

St. Louis prosecutors charged Jacquelyn Powers with first-degree endangering the welfare of a child, resulting in the death of a child, Thursday, according to court documents.

Powers’ 14-year-old daughter complained of toothache on Oct. 3 at their home in Overland, a St. Louis suburb.

The mother first tried giving her child Tylenol to ease the pain, but when that didn’t work, she allegedly gave the teen a pill she found in her drawer.

About 10 hours after the teen took the pill, she was found dead, according to the Overland Police Department.

The mother told police she thought she had given her daughter oxycodone, which she had received during a previous surgery. according to Fox 2 Now.

However, an autopsy revealed that the child died from a fentanyl overdose and tested negative for the presence of oxycodone.

Powers told investigators the reason she took the fentanyl pills was because she was trading some of her oxycodone with her mother to “protect” her from dangerous pills she allegedly purchased on the street.

Police said Powers then placed those pills in her drawer, which she ended up giving to her daughter.

Powers “admitted to giving the victim what she believed to be a prescription painkiller and that other illegal drugs were inside the home with other minor children,” according to a ensure of the 21st Judicial Circuit Court of St. Louis County.

“It’s tragic,” said Capt. Jim Morgan of the Overland Police Department, according to Fox 2 now.

“This shouldn’t happen.”

Powers was arrested and was seen being taken from her Overland home in handcuffs Friday, according to the news outlet.

She is being held on $150,000 bail at the St. Louis County Jail.

Powers is scheduled to return to court Nov. 19 for a bond reduction hearing.

His preliminary hearing is scheduled for December 11.

“Endangering the welfare of a child in the first degree, resulting in the death of a child” is considered a Class A felony.

This is the most serious charge under this law.

It carries the most severe potential penalties because it denotes a situation in which a child’s welfare has been so seriously compromised that it has led to their death.

If convicted, Powers could be sentenced to life in prison with the possibility of parole, according to state law.