Nitric oxide supplements may cause a sudden drop in blood pressure, leading to dizziness, lightheadedness, or fainting, especially in individuals already taking medication for hypertension.
Some people may experience headaches or migraines as a side effect of nitric oxide supplements, possibly due to changes in blood flow and vasodilation.
Nitric oxide supplements may cause gastrointestinal discomfort, including nausea, bloating, or diarrhea, particularly when taken in high doses or on an empty stomach.
Rarely, nitric oxide supplements may trigger allergic reactions, such as rash, itching, swelling, or difficulty breathing, in susceptible individuals.
Nitric oxide supplements may interact with certain medications, including blood pressure medications, erectile dysfunction drugs, and nitrates, increasing the risk of adverse effects or complications.