Inderal
Brand
name:Inderal
Pronounced: IN-der-al
Generic name: Propranolol hydrochloride
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Why
is Inderal prescribed?
Inderal,
a type of medication known as a beta blocker, is used in the
treatment of high blood pressure, angina pectoris (chest pain,
usually caused by lack of oxygen to the heart due to clogged
arteries), changes in heart rhythm, prevention of migraine headache,
hereditary tremors, hypertrophic subaortic stenosis (a condition
related to exertional angina), and tumors of the adrenal gland.
It is also used to reduce the risk of death from recurring heart
attack.
When
used for the treatment of high blood pressure, it is effective
alone or combined with other high blood pressure medications,
particularly thiazide-type diuretics. Beta blockers decrease
the force and rate of heart contractions, reducing the heart's
demand for oxygen and lowering blood pressure.
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Most
important fact about Inderal
If
you have high blood pressure, you must take Inderal regularly
for it to be effective. Since blood pressure declines gradually,
it may be several weeks before you get the full benefit of Inderal;
and you must continue taking it even if you are feeling well.
Inderal does not cure high blood pressure; it merely keeps it
under control.
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How
should you take Inderal?
Inderal
works best when taken before meals. Take it exactly as prescribed,
even if your symptoms have disappeared.
Try
not to miss any doses. If this medication is not taken regularly,
your condition may worsen.
—If
you miss a dose…
Take
it as soon as you remember. If it is within 8 hours of your
next scheduled dose, skip the one you missed and go back to
your regular schedule. Never take 2 doses at the same time.
—Storage
instructions…
Store
at room temperature in a tightly closed, light-resistant container.
Protect from freezing or excessive heat.
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What
side effects may occur?
Side
effects cannot be anticipated. If any develop or change in intensity,
inform your doctor as soon as possible. Only your doctor can
determine if it is safe for you to continue taking Inderal.
Side
effects may include:
Abdominal cramps, colitis, congestive heart failure, constipation,
decreased sexual ability, depression, diarrhea, difficulty breathing,
disorientation, dry eyes, fever with sore throat, hair loss,
hallucinations, headache, light-headedness, low blood pressure,
lupus erythematosus (a disease of the connective tissue), nausea,
rash, reddish or purplish spots on the skin, short-term memory
loss, slow heartbeat, tingling, prickling in hands, tiredness,
trouble sleeping, upset stomach, visual changes, vivid dreams,
vomiting, weakness, worsening of certain heartbeat irregularities
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Why
should Inderal not be prescribed?
If
you have inadequate blood supply to the circulatory system (cardiogenic
shock), certain types of irregular heartbeat, a slow heartbeat,
bronchial asthma, or severe congestive heart failure, you should
not take Propranolol.
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Special
warnings about Inderal
If
you have a history of congestive heart failure, your doctor
will prescribe Inderal cautiously.
Inderal
should not be stopped suddenly. This can cause increased chest
pain and heart attack. Dosage should be gradually reduced.
If
you suffer from asthma or other bronchial conditions, coronary
artery disease, or kidney or liver disease, this medication
should be used with caution.
Ask
your doctor if you should check your pulse while taking Inderal.
This medication can cause your heartbeat to become too slow.
This
medication may mask the symptoms of low blood sugar or alter
blood sugar levels. In addition, diabetics who experience a
severe drop in blood sugar after taking insulin may suffer a
spike in blood pressure if they are also taking Inderal.
Notify
your doctor or dentist that you are taking Inderal if you have
a medical emergency, and before you have surgery or dental treatment.
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Possible
food and drug interactions
If Inderal is taken with certain other drugs, the effects of
either could be increased, decreased, or altered. It is especially
important to check with your doctor before combining Inderal
with the following:
-
Alcohol
- Aluminum hydroxide gel (Amphojel)
- Antipyrine (Auralgan)
- Calcium-blocking blood pressure drugs such as Cardizem, Procardia,
and Calan
- Certain high blood pressure medications such as Diupres and
Ser-Ap-Es
- Chlorpromazine (Thorazine)
- Cimetidine (Tagamet)
- Epinephrine (EpiPen)
- Haloperidol (Haldol)
- Insulin
- Lidocaine (Xylocaine)
- Nonsteroidal anti-inflammatory drugs such as Motrin and Naprosyn
- Oral diabetes drugs such as Micronase
- Phenobarbitone
- Phenytoin (Dilantin)
- Rifampin (Rifadin)
- Theophylline (Theo-Dur and others)
- Thyroid medications such as Synthroid
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Special
information
The effects of Inderal during pregnancy have not been adequately
studied. If you are pregnant or plan to become pregnant, inform
your doctor immediately. Inderal appears in breast milk and
could affect a nursing infant. If Propranolol is essential to
your health, your doctor may advise you to discontinue breastfeeding
until your treatment with this medication is finished.
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Recommended
dosage
ADULTS
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All dosages of Inderal, for any problem, must be tailored to
the individual. Your doctor will determine when and how often
you should take Propranolol. If you are over 65, the doctor
will probably start with a relatively low dosage. Remember to
take it exactly as directed.
Hypertension
The
usual starting dose is 40 milligrams 2 times a day. This dose
may be in combination with a diuretic. Dosages are gradually
increased to between 120 milligrams and 240 milligrams per day
for maintenance. In some cases, a dose of 640 milligrams per
day may be needed. Depending on the individual, maximum effect
of this drug may not be reached for a few days or even several
weeks. Some people may do better taking this medication 3 times
a day.
Angina
Pectoris
The
usual daily dosage is 80 milligrams to 320 milligrams, divided
into 2, 3, or 4 smaller doses. When your treatment is being
discontinued, your doctor will reduce the dosage gradually over
a period of several weeks.
Irregular
Heartbeat
The
usual dose is 10 milligrams to 30 milligrams 3 or 4 times a
day, before meals and at bedtime.
Heart
Attack
The
usual daily dosage is 180 milligrams to 240 milligrams divided
into smaller doses. The usual maximum dose is 240 milligrams,
although your doctor may increase the dose when treating heart
attack with angina or high blood pressure.
Migraine
The
usual starting dosage is 80 milligrams per day divided into
smaller doses. Dosages can be increased gradually to between
160 milligrams and 240 milligrams per day. If this dose does
not relieve your symptoms in 4 to 6 weeks, your doctor will
slowly take you off Propranolol.
Tremors
The
usual starting dose is 40 milligrams, 2 times per day. Symptoms
will usually be relieved with a dose of 120 milligrams per day;
however, on occasion, dosages of 240 milligrams to 320 milligrams
per day may be necessary.
Hypertrophic
Subaortic Stenosis
The
usual dose is 20 milligrams to 40 milligrams, 3 to 4 times a
day, before meals and at bedtime.
Before
Adrenal Gland Surgery
The
usual dose is 60 milligrams a day divided into smaller doses
for 3 days before surgery in combination with an alpha-blocker
drug.
Inderal
may also be taken by people with inoperable tumors in doses of
30 milligrams a day, divided into smaller doses.
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CHILDREN
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Inderal will be carefully individualized for use in children
and is used only for high blood pressure. Doses in children
are calculated by body weight, and range from 2 milligrams to
4 milligrams per 2.2 pounds daily, divided into 2 equal doses.
The maximum dose is 16 milligrams per 2.2 pounds per day.
If
treatment is stopped, Propranolol must be gradually reduced
over a 7- to 14-day period.
Inderal
is also available in a sustained-release formulation, called
Inderal LA, for once-a-day dosing.
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Overdosage
No
specific information on Inderal overdosage is available; however,
overdose symptoms with other beta blockers include:
Extremely
slow heartbeat, irregular heartbeat, low blood pressure, severe
congestive heart failure, seizures, wheezing
Any
medication taken in excess can have serious consequences. If
you suspect an overdose, seek medical attention immediately.
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