Side effects

Central-acting agents can have strong side effects. Some possible side effects are:

• Slow heart rate.
• Constipation.
• Dizziness.
• Extreme sleepiness.
• Dry mouth.
• Extreme tiredness.
• Fever.
• Headache.
• Trouble getting erections, also called erectile dysfunction or impotence.

Do not suddenly stop taking a central-acting agent. Doing so can cause a dangerous increase in blood pressure. Do not stop taking these medicines without talking with your healthcare professional.

Talk with your healthcare team if you have any questions about the medicines you take.