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The signs to look out for include cough, difficulty breathing, low blood pressure and irregular heart rate.

Sniffing alkyl nitrites can cause skin irritation, dizziness, low blood pressure, headaches and other unpleasant side effects.

The data, published in the journal Nature Medicine, also showed low blood pressure, including fainting, headaches, disturbed sleep, kidney stones, inflammation in the kidneys and a range of bone or joint pains, including arthritis, became more frequent.

Yet after reviewing all 155 pages of the PharmaGABA notice, FDA scientists raised concerns about the product’s purity, its risk for causing low blood pressure and electrolyte imbalances, and the lack of data on how PharmaGABA is metabolized, among other problems.

They concluded that drinking enough water can help with weight loss and prevent kidney stones, as well as migraines, urinary tract infections and low blood pressure.