Merck & Co. | Blocadren (Medication)


Blocadren/timolol is a beta blocker administered after heart attacks. It is used with or without other medications to treat high blood pressure (hypertension). It lowers high blood pressure helps prevent strokes, heart attacks, and kidney problems. This medication is also used after a heart attack to help prevent another heart attack from occurring.

It works by blocking the action of certain natural chemicals in your body such as epinephrine on the heart and blood vessels. This effect lowers the heart rate, blood pressure, and strain on the heart. This medication is also used to prevent migraine headaches. ...

Side Effect:

Common side effects may include:slow or uneven heartbeats; feeling light-headed, fainting; feeling short of breath, even with mild exertion; swelling of your ankles or feet; nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); depression; or cold feeling in your hands and feet.

Other less serious side effects are more likely to occur, such as:decreased sex drive, impotence, or difficulty having an orgasm; sleep problems (insomnia); tired feeling; or anxiety, nervousness.

Seek immediate medical attention if you experience any symptoms of a serious allergic reaction may include:rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. ...


If you need to have any type of surgery, you may need to temporarily stop using timolol. Be sure the surgeon knows ahead of time that you are using Blocadren.

Blocadren can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert. Avoid drinking alcohol, which could increase drowsiness and dizziness while you are taking timolol.

Blocadren is only part of a complete program of treatment for hypertension that may also include diet, exercise, and weight control. Follow your diet, medication, and exercise routines very closely if you are being treated for hypertension.

During pregnancy and breastfeeding is not recommended to use this medicine without your doctor's advice. ...