Metamucil is a fiber laxative used to treat constipation. As with almost every medicinal drug, Metamucil has some side effects that the patient may want to consider before making use of it.
Metamucil taken regularly for an extended period of time may cause damage to muscles or intestinal nerves.
Metamucil may cause bloating, stomach cramps or gas.
Side effects of Metamucil include dizziness or fainting.
Some of the major side effects of Metamucil may include vomiting and difficulty swallowing.
Further major side effects of Metamucil include bloody stool or rectal bleeding.