If you've ever been constipated, you may have tried nonprescription laxatives. A number of factors can disrupt the bowels and cause constipation. These include diet, fluid intake, physical activity and several medicines.

Many different types of laxatives are available without a prescription. They may be safe and effective to treat constipation once in a while. But it's very important to read the label carefully and use them as directed. Overuse of laxatives has been linked to serious health conditions. And you could become dependent on them for a bowel movement.

Call your healthcare team immediately if you have:

• Severe stomach cramps or pain.
• Unexplained changes in bowel patterns.
• Severe diarrhea.
• Bloody stools or rectal bleeding.
• Constipation that lasts longer than seven days even with laxative use.
• Weakness or unusual tiredness.
• Dizziness.