Compare Tenex vs. timolol

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

Scroll horizontally → to see comparisons



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.
How it works
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
Alpha agonist
Prescription only
Coming soon.
Available as
  • Pill
  • Extended release
  • Pill
  • Eye drops
  • Extended release
Used for (click to learn more)
  • Hypertension Migraine; Prophylaxis Ocular hypertension Open-angle glaucoma Postmyocardial infarction syndrome; Prophylaxis
Find lowest prices
Powered by GoodRxSave on your next prescription. Be sure you’re getting the lowest price for your medication, even if you have insurance.
Reviews & ratings
Button Group. All currently active
Button Group. All currently active

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

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

Side effects
  • Drowsiness 31%
  • Fatigue 8%
  • Dizziness 7%
  • Headache 5%
More Tenex side effects »

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

FDA side effect reports for timolol »
Risk factors for serious side effects
  • 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 category
  • Limit the amount of alcohol you drink while taking this.
No specific alcohol-related info.
No specific food-related info.No specific food-related info.
Kidneys and liver
No specific kidneys and liver-related info.No specific kidneys and liver-related info.
No specific sex-related info.No specific sex-related info.
No specific sleep-related info.No specific sleep-related info.
No specific weight-related info.No specific weight-related info.
Upsides and benefits
  • 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
  • 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
  • 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
More about timololSide effectsFDA package insert