Integrative Health Consultant and Educator
Integrative Health Consultant and Educator

How To Take Tenex (Guanfacine)

Tenex (Guanfacine) is usually taken once or twice daily.  It can be taken 3-4 times/day but it has a 16 hour half life so frequent dosing is not necessary.  If taken regularly total blood levels will gradually increase over the first three days and then will level off.

Tenex comes in 1 and 2 mg tablets that are easily broken in half.  If taken primarily for help with sleep or if an individual is very sensitive to side effects it can be taken in the evening.  For irritability, muscle spasms, anxiety, increased blood pressure or any symptoms associated with high levels of norepinephrine it is usually taken in the am or am and evening.

As with most medications, start with a low dose – ½ of 1mg and gradually increase as needed until the right dose is found.  Extra doses can be taken for acute symptoms like agitation associated with increased or unusual stress.

Side-effects are usually mild and transient – especially sluggishness or dizziness.  If any side effects are bothersome decrease the dose and take at bedtime only.

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