Calnif retard is a prescription medication used to control hypertension,
and to treat heart diseases (Angina). Its generic name is Nifedipine. Calnif retard is
given orally. In addition, preparations that are put under the tongue is also
available (for rapid reduction of blood pressure).
Retard means slow release.
Calnif retard or slow release tablets |
Retard means slow release.
Retard means slow release. |
Do not crush or divide the medication, otherwise this will rapidly released into blood stream causing severe lowering of blood pressure.
What your doctor
consider when giving Calnif to you?
Some people with
history of heart attacks should not be given this medication. So it is very
important to mention whether you developed heart attacks before getting this
medication.
If you got history of Heart attacks then mention that to your doctor |
This medication should not be given, if heart pain (pain in left
side of the chest) occurs or worsening of existing pain.
Doctors use this drug cautiously in patients with poor cardiac
reserve, heart failure, severe hypotension, elderly patients, patients with
diabetes mellitus, and hepatic impairment.
It is important to mention to your doctor whether you take medications
for tuberculosis.
In addition, this drug should not be used for following conditions
1. Cardiogenic shock
2. Advanced aortic stenosis
3.
Porphyria
4.
Myocardial
infarctions (heart attacks).
What are the common side effects of this medication?
Common side
effects of Calnif
1. Stomach upset
2.
Reduced
blood pressure
3.
Increased
heart rate
4.
Headache
5.
Dizziness
6.
Lethargy
7.
Lack
of energy
What are the less common side effects of Calnif?
1. Syncope (Sudden faint attacks)
2.
Nasal
congestion.
3.
Shortness
of breath
4.
Anxiety
(Sudden terrible fearfulness)
5.
Sleep
disturbance
6.
Migraine
7.
Pins
and needles (paresthesia).
8.
Aggravation
of migraine headaches
9.
Sleep
problems
10.
Passing
increased amount of urine
11.
Erectile
dysfunction
12.
Nose
bleeds
13.
Muscle
pain
Hypersensitivity reactions can occur with some patients. They are
hives, rashes, and itchiness, and yellowish discoloration of the body.
Rarely following side effects are reported. They include loss of appetite,
swelling of the gums, mood abnormalities, hyperglycemia, and male infertility.
Skin rashes when
exposed to sunlight (Photo sensitivity) reactions are also reported.
Difficulty in
swallowing, intestinal obstruction, and intestinal ulcers has been reported.
Increased sizes of the breasts, even in males can occur.
Very rarely Calnif causes agranulocytosis (reduction in all blood
cells).
Pregnancy
This medication
can delay delivery of baby. So your doctor may not prescribe this medication
during the pregnancy. It is sometimes used to delay delivery when the baby is
premature.
Breast feeding
Amount found in
milk is too small to be harmful. But manufactures are advising doctors to avoid
using Calnif, unless indicated.
Drug and food interactions
Patients should
avoid taking grape fruit juice while taking Calnif. Grapefruit juice can
increase plasma concentration of Calnif.
In addition, anti tuberculosis medication, Rifampicin reduces
plasma concentration of this drug. Calnif can cause severe drop in the
blood pressure, if co administered with beta blockers such as Tenormin.
Side effects can
be reduced, if taken wholly with full glass of water without crushing or
breaking the capsules.
Sources
AHFS Drug
Information
British National
Formulary www.bnf.org