Officers Adrian Sulejmani and John Donado pulled over the 1995 Toyota Camry for equipment violations and the driver's failing to use turn signals, Capt. Laurence Martin said.
Driver Bobbie Mathews, 45, had a suspended license and "white powdered residue around her nostrils," he said.
The officers then found her carrying the heroin -- stamped "LEXUS" -- along with the Taser-style stun gun, Martin said.
They turned up a small amount of pot, as well as empty heroin bags stamped "Feel the High," the captain added.
Passenger Seladin Altinay, 24, was charged with having the marijuana and drug paraphernalia and Matthews with the heroin and weapon, among other counts, he said.
Both were released on summonses to appear in court.
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