September 19, 2021

CoQ10 Side Effects

Also known as Coenzyme Q10, CoQ10 is chemically similar to a vitamin. In the normal human body, CoQ10 is naturally made and promotes cell growth. It functions as an antioxidant and fights off free radicals that could damage a cell’s integrity. This chemical is often found in meats, soy, sardines and peanuts. Some individuals choose to take CoQ10 because they believe it will help protect the heart and boost athletic performance. In the United States, CoQ10 is sold over the counter as a supplement.

One common misconception among health food junkies is that a supplement is safer than prescription drugs. This rumor is completely untrue. Herbal supplements, vitamins and minerals are just as likely to have serious side effects and overdoses as traditional forms of medication. Individuals who are taking CoQ10 have to be extremely careful not to consume an excessively high dose. Before taking the dosage, you should always discuss the amount, frequency and risks with your doctor.

Medical Claims

Proponents of CoQ10 think that this vitamin will help protect the teeth and prevent cancer. Scientists have noticed that patients who have cancer often have extremely low levels of CoQ10 in their bodies, but there is no definitive proof. Some individuals believe that this supplement can protect the body from heart failure, but this claim has not been scientifically supported either. Despite all of the claims, there is no evidence that CoQ10 helps the teeth, prevents cancer or creates a healthier heart.

coq10 side effectsCommon Side Effects of CoQ10

Although science has not proven any of the benefits of CoQ10, several clinical studies have shown some of the supplement’s side effects. Individuals will often suffer from insomnia if they take more than 100 milligrams in a day. In doses greater than 300 milligrams, patients will experience higher levels of enzymes in the liver. Cases of dizziness, photosensitivity, headaches, fatigue and rashes have been recorded.

Patients who take CoQ10 are at risk for many different side effects. These side effects may include any of the following:

– Rashes
– Dizziness
– Nausea
– Vomiting
– Fatigue
– Headache
– Heartburn or indigestion
– Abdominal pain
– Photosensitivity or vision problems
– Migraines
– Irritability or anxiety
– Blood thinning
– Hypotension

One problem with taking a supplement is the lack of regulation. The FDA does not closely regulate supplements like it does prescription medications. Due to this lax regulation, the side effects and benefits of this supplement are not as well researched as prescription drugs. To be on the safe side, patients should not take CoQ10 if they are on any anti-coagulant. They should also be wary if they are currently taking insulin. CoQ10 may lower blood sugar which would cause the diabetic to require less insulin.

Allergic Reactions

Some individuals who take CoQ10 may have an allergic reaction to the supplement or to the inactive ingredients in the capsule. Signs of an allergic reaction may include problems breathing or swallowing. Patients who are allergic to the supplement may have rashes, hives or itching. If you or a loved one has any of these symptoms or unexplained swelling, you should immediately contact your doctor. For severely allergic patients, taking CoQ10 could potentially be fatal.


Patients who are pregnant, nursing or have a medical condition should always talk to their doctor before taking this medication. CoQ10 may interact with any existing medical problems or medication. In addition, the supplement can be transferred through the umbilical cord or breast milk to a baby. Only a qualified medical practitioner can decide if this supplement will affect your child negatively.

Before taking any medication, you should always talk to your doctor. Patients should only take this supplement in the amount recommended by their doctor. If the patient has side effects or develops an allergy to CoQ10, they should immediately see their physician. Your doctor can decide a treatment method or change the dosage you are taking.