Compare Tenex vs. Timolol

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Tenex
(Guanfacine)

Timoptic
(Timolol)

Treats ADHD and lowers blood pressure. Tenex (Guanfacine) can be used to treat both blood pressure and ADHD, but it's not recommended as a first-line treatment for either problem.Coming soon.
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Reviews & ratings
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Have you used Tenex (Guanfacine)?
Worth itNot sureNot worth it

Not enough reviews for this drug. Help someone out, leave a review!

Have you used Timoptic (Timolol)?
Worth itNot sureNot worth it
Side effects
TenexTimolol
  • Dry mouth 1%
  • Dizziness 2%
  • Any side effect 3%
  • Muscle weakness 2%
  • Drowsiness 13%
  • Impotence 3%
  • Constipation 5%
More Tenex side effects »

We haven’t found good data for Timolol side effects.

FDA side effect reports for Timolol »
How it works
TenexTimolol
Tenex (Guanfacine) is a centrally-acting alpha agonist medication. It lowers blood pressure by slowing down the heart rate and relaxing the blood vessels. It's not clear how Tenex (Guanfacine) works in ADHD, but it's used when stimulants haven't worked or can't be used in people.Coming soon.
Type of medication
TenexTimolol
Prescription only
Available as
TenexTimolol
  • Pill
  • Extended release
  • Pill
  • Eye drops
  • Extended release
Used for
TenexTimolol
  • Hypertension Migraine Prophylaxis Ocular Hypertension Open Angle Glaucoma Postmyocardial Infarction Syndrome Prophylaxis
Risk factors for serious side effects
TenexTimolol
  • Taking other medications that cause sedation or sleepiness
  • Stopping Tenex (Guanfacine) suddenly to treat high blood pressure
Detailed Tenex (Guanfacine) risks & warnings »
Coming soon.
Pregnancy

Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

Alcohol
TenexTimolol
  • Limit the amount of alcohol you drink while taking this.
No alcohol related info.
Sleep
TenexTimolol
  • You can feel sleepy the first few times you take it, or when your dose is increased. Don't drive or do anything that requires concentration until you know how the medication affects your body.
  • People report having sleepiness or sedation while on Tenex (Guanfacine). You're at higher risk for this if you're taking other medications that have similar effects. Don't drive or do anything that requires concentration until you know how Tenex (Guanfacine) affects you.
No sleep related info.
Upsides and benefits
TenexTimolol
  • The same medication treats two different things, high blood pressure and attention deficit hyperactivity disorder (ADHD).
  • It's not a "controlled medication".
  • Used to control ADHD when stimulant medications haven't worked or can't be used due to other medical problems.
  • Available as a generic medication, so it should be more affordable than other options.
Coming soon
Downsides and risks
TenexTimolol
  • Doesn't control ADHD as well as stimulants do, so it's used as a second-line medication.
  • Not a preferred drug to control blood pressure.
  • Can't be stopped suddenly, especially for blood pressure, since the blood pressure can dramatically increase.
Coming soon
Tips from our pharmacists for people taking the medication
TenexTimolol
  • Don't stop taking Tenex (Guanfacine) without talking to your doctor first.
  • Limit the amount of alcohol you drink while taking this.
  • Drink plenty of liquids and don't get overheated while taking Tenex (Guanfacine).
  • You can feel sleepy the first few times you take it, or when your dose is increased. Don't drive or do anything that requires concentration until you know how the medication affects your body.
  • Can take up to 2 weeks for the maximum effect.
Coming soon
Learn more
More about TenexSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Tenex (Guanfacine)?
Worth itNot sureNot worth it
More about TimololSide effectsReviews & ratingsFDA package insert
Have you used Timoptic (Timolol)?
Worth itNot sureNot worth it