For anxiety, you’ll usually take propranolol for a short amount of time, to help with your physical symptoms. There are some medicines that may affect the way propranolol works. Bring the propranolol packet or leaflet inside it, any remaining medicine, and any other medicines you take. If you forget to take a dose of propranolol, take it as soon as you remember, unless it’s nearly time for your next dose. It does NOT include all information about conditions, treatments, medications, side effects, or risks that may apply to a specific patient. You must check to make sure that it is safe for you to take this drug with all of your drugs and health problems.
Speak to a care advisor
- Talk to your doctor about how you feel and about any symptoms you experience during this time.
- Reduced starting dose will therefore be necessary.
- In addition to its effects on the adrenergic system, there is evidence that indicates that propranolol may act as a relatively weak antagonist of certain serotonin receptors, namely the 5-HT1A, 5-HT1B, and 5-HT2B receptors.
- Do not start, stop, or change the dose of any drug without checking with your doctor.
Propranolol is a type of medicine called a beta blocker. They are not tested in the same way as pharmacy and prescription medicines. It’s important to treat your high blood pressure to keep you well. If your doctor or health visitor says that your baby is healthy, it’s OK to take propranolol while breastfeeding. There may be other medicines that are better to use during pregnancy.
Enter your medication into the WebMD interaction checker In particular, make sure that you discuss if you are using any of the following before taking propranolol. There are no known interactions between propranolol and foods or drinks. Available data does not show that propranolol would negatively affect pregnancy or harm an unborn baby. This will help them determine if propranolol is right for you.
Common side effects
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This medicine is available only with your doctor’s prescription. It works by affecting the response to nerve impulses in Propranolol brands certain parts of the body, like the heart. It may also be used to reduce the risk of death in patients who have heart attacks. Propranolol is also used to treat severe chest pain (angina), migraine headaches, or hypertrophic subaortic stenosis (thickened heart muscle).
CNS depressants are medicines that slow down the nervous system and may cause drowsiness. This medicine may cause some people to become less alert than they are normally. Ask your healthcare professional how you should dispose of any medicine you do not use. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. If you miss a dose of this medicine, take it as soon as possible. The following information includes only the average doses of this medicine.
Chlorpromazine has been found to increase propranolol levels by 1.7-fold. The CYP1A2 inhibitor zolmitriptan increased peak propranolol levels by 1.4-fold and area-under-the-curve levels by 1.56-fold, while the CYP1A2 inhibitor rizatriptan increased propranolol peak levels by 1.8-fold and area-under-the-curve levels by 1.7-fold. The calcium channel blocker nisoldipine increased peak levels of propranolol by 1.5-fold and area-under-the-curve levels by 1.3-fold, while nicardipine increased propranolol peak levels by 1.8-fold and area-under-the-curve levels by 1.5-fold. The CYP1A2 inhibitor fluvoxamine has been found to increase propranolol levels by 5-fold.
- This medicine may also be used to treat irregular heartbeats, tremors, or pheochromocytoma (adrenal gland tumor).
- If you’re taking it for anxiety, there do not seem to be any lasting harmful effects if you take it for several months or years.
- Propranolol is generally safe to take for a long time.
Oral solution:
Do not drive or do other activities that require alertness or coordination until you know how propranolol affects you. Keep propranolol out of the reach of children. Ask your pharmacist to recommend an appropriate measuring device. A household spoon is not an accurate measuring device and may cause you to take the wrong dose. Otherwise, take propranolol with or without food. If using propranolol oral solution for infantile hemangioma, give it with food or right after food.
What are the serious side effects of propranolol?
The metabolism of propranolol involves cytochrome P450 enzymes including CYP2D6, CYP1A2, and CYP2C19. Propranolol shows marked interindividual variability in pharmacokinetics, with propranolol levels varying 20-fold in different individuals. Propranolol can be absorbed along the whole intestine with the main absorption site being the colon, which means people who have lost their colon due to surgery may absorb less propranolol. Studies have demonstrated propranolol’s ability to block cardiac, neuronal, and skeletal voltage-gated sodium channels, accounting for its known membrane stabilizing effect and antiarrhythmic and other central nervous system effects. In addition to its effects on the adrenergic system, there is evidence that indicates that propranolol may act as a relatively weak antagonist of certain serotonin receptors, namely the 5-HT1A, 5-HT1B, and 5-HT2B receptors. Propranolol can cross the blood–brain barrier and exert effects in the central nervous system in addition to its peripheral activity.
Side Effects
It was the first beta-blocker effectively used in the treatment of coronary artery disease and hypertension. There were no significance differences in area-under-the-curve levels of propranolol in CYP2D6 poor metabolizers versus extensive metabolizers. Approximately 91% of an oral dose of propranolol is eliminated in urine as 12 metabolites.
Reporting side effects
Talk with your care team about all of the medications you take. Other medications may affect the way this medication works. If you miss a dose, take it as soon as you can. Do not share this medicine with others.
In one small study, individuals given propranolol immediately after trauma experienced fewer stress-related symptoms and lower rates of PTSD than respective control groups who did not receive the drug. Other beta blockers that have been used to treat anxiety disorders besides propranolol include atenolol, betaxolol, nadolol, oxprenolol, and pindolol. It is thought that beta blockers do not directly treat psychological symptoms of anxiety, but can help control physical symptoms such as palpitations, and this may interfere with a positive feedback loop to indirectly reduce psychological anxiety.
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Propranolol is a non-selective β-adrenergic receptor antagonist, or beta blocker; that is, it blocks the action of epinephrine (adrenaline) and norepinephrine (noradrenaline) at both β1- and β2-adrenergic receptors. It may decrease triiodothyronine (T3) levels when taken with thyroxine (T4). Propranolol decreased lovastatin or pravastatin area-under-the-curve levels by 18 to 23% but did not affect fluvastatin. Propranolol inhibits the metabolism of the benzodiazepine diazepam and can increase exposure to diazepam.
It can also prevent migraine headaches by relaxing the blood vessels in your brain. Be aware, though, that in some sports propranolol is not allowed if you’re competing at a high level. However, this is not a common side effect and there is not enough evidence to say for sure that propranolol is causing it. If you’re trying to get pregnant, or you’re having problems getting pregnant while on propranolol, speak to your doctor.
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Talk to your doctor about how you feel and about any symptoms you experience during this time. Take propranolol at around the same time(s) every day. Immediate-acting propranolol tablets or solution may be taken two, three, or four times a day.
This is not a list of all drugs or health problems that interact with this drug. Alcohol may increase the blood-pressure-lowering effect of propranolol. Breast-feeding The drug passes into the breast milk, but at normal doses adverse effects on the baby are unlikely.
GOV.UK has more information on the law on drugs and driving. Talk to your doctor or pharmacist if you’re unsure whether it’s safe for you to drive while taking propranolol. Propranolol can make some people feel dizzy, especially when they first start taking it or after taking a bigger dose. Some people on propranolol say their sex drive goes down and some men find they cannot get an erection. Some people on propranolol say they put on weight, especially in the first few months of taking it.