5% of the human population uses levothyroxine as a treatment for hypothyroidism. This research is targeted to observe the impact of a commonly used drug on the seeds of the most frequently consumed plants. The chia seeds and wheat seeds were treated with a concentrated solution of levothyroxine over the course of 4 weeks. After the seedlings grew, the plants were preserved in ethanol. Following a month of preservation, the plants were calcinated then their ashes were examined for their mineral composition. This study has shown a big influence of levothyroxine on the growth and sprouting of the Salvia hispanica and Triticum aestivum seeds.