Article: Any herbs can potentially cause adverse side effects, especially if you're on daily medications. Always tell your doctor when you're starting an herbal regimen to find out if this is a safe idea. Chamomile in particular can interact with blood-thinning drugs, so don't use it if you take blood thinners. Just like any other medication, these herbs are only safe when taken in the correct quantities. Follow the dosage size on every product you use and never take too much. If you don't know the proper dosage for a supplement you're taking, ask your doctor about it. Most anxiety-reducing herbs can also cause drowsiness, especially if you haven't taken them before. When you first start taking a new herb, wait a few hours before driving or operating machinery so you don't suddenly get drowsy in the middle of a task. Herbal supplements can cause a number of adverse side effects like dizziness, nausea, or heartburn. If you don't like how something makes you feel, then stop taking it.

What is a summary?
Ask your doctor before you start taking any herbal supplements. Follow all the dosage or serving instructions that come with herbs. Wait until you know how the herbs affect you before driving. Stop if you experience any adverse side effects.