But even when used all on their own, supplements can and do have their very own side effects. For instance, St. John's Wort has been known to cause high blood pressure, headaches, stiff neck, nausea, and vomiting. For fair-skinned people, it can aggravate sunburn and cause blistering after sun exposure.
Simply going online will show you just how many side effects there are for each herbal remedy. Many of these side effects sound just like those one experiences when taking prescription medications. They include: dizziness, nausea, headaches, dry mouth and many, many more.