MANILA - Actress Alma Concepcion said that her drug-using past should serve as a warning to younger Filipinos, in light of last month's Closeup Forever Summer concert tragedy that killed at least five people.

"I was almost there at papunta na ako sa landas na mali," Concepcion, who was at the event in Pasay City with her 16-year-old son, told ABS-CBN News' MJ Felipe. "Hindi lahat ng tao nakakaalis tulad ko."

She added: "I don't want my son to experience what I experienced and I don't want any teenager to experience iyong nangyari lately. Parang, wow at may mas grabe pa pala sa nangyari sa akin."

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Concepcion, a former beauty queen, was arrested in Guam for possession of shabu. She pleaded guilty to carrying .08 grams of the illegal substance on July 1998.

"We should use history to make us better people. Sana iyong susunod na henerasyon, iyong mga pagkakamali namin ay wag na nilang ulitin," she explained.

Concepcion said her critics still bring up her past drug use. "Matatawa ka kasi kahit hanggang ngayon ay marami pa rin akong nae-encounter na mga tao na parang nagsasabi na wala kang karapatan magbago," she admitted.

Concepcion also vowed support for President-elect Rodrigo Duterte's all-out war on illegal drugs.

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"I'm very, very happy na magkakaroon na ng environment na hopefully magiging clean for the next generation," said Concepcion. "The kids kasi nowadays are even proud of flaunting it [drug use]. So nakakatakot na."