For one, saw palmetto is known to induce heart palpitations. Hence, those who are currently taking beta blockers and other maintenance medication should first consult a doctor to determine if any of the Provillus ingredients would counteract with their regimen.

Nettle Root, another botanical element in the men’s formula, may cause upset stomach, difficulty in urination and bloating. This may do a degree of harm to those with kidney problems. Otherwise, Provillus is best taken after a meal.

PABA (para-aminobenzoid Acid), one of the main ingredients in the Provillus women’s formula, is known to induce nausea, vomiting and rash for those who are sensitive to this particular substance. Pregnant and nursing mothers should avoid PABA.

While side-effects from Vitamin B6, magnesium and zinc are rare, too much may do some damage in the long-term. Again, take a good look at the supplements and medication you are currently taking. Worry about Provillus side effects? See your doctor to find out if taking Provillus will do more harm than good.