Most people are aware that prescription medications can interact with each other, sometimes causing adverse side effects. However, over the counter products such as vitamins or herbal products can also interact with prescription medications – these interactions can potentially change the effectiveness of the drug and lead to harm, such as a fall. If you are on prescription drugs, it is important to have a discussion with your doctor or pharmacist before taking any over the counter medications to ensure you are taking the right products at the right times. A pharmacist can also conduct a full medication review with all of your prescriptions and over the counter products and advise you on safe medication use.