At steady-state, the bioavailability of adalat la tablets ranges from 68-86 relative to adalat capsules. In rats, toxic effects occurred at concentrations above 100 ppm in the feed (approximately 5-7 mgkg bodyweight). For the prophylaxis of angina pectoris, the recommended initial dose is one 30 mg tablet once-daily.
For angina adalat la works by relaxing and expanding the arteries supplying the heart. Based on pharmacokinetic data for adalat la no dose adaptation in elderly people above 65 years is necessary. This allows more blood and oxygen to reach the heart and decreases the strain on it.
Read all of this leaflet carefully before you start taking this medicine because it contains important information for you. Additionally, nifedipine dilates submaximally both clear and atherosclerotic coronary arteries, thus protecting the heart against coronary artery spasm and improving perfusion to the ischaemic myocardium. Ingestion of grapefruitgrapefruit juice is therefore to be avoided while taking nifedipine (see section 4.
Also, as a result of this, care should be exercised when administering adalat la to patients, as obstructive symptoms may occur. This is normal its the outer shell of the tablet which is not digested by the body. In a carcinogenicity study in rats (two years), there was no evidence of a carcinogenic effect of nifedipine.
After release and absorption of the last dose the plasma concentration finally declines with an elimination half-life as seen in conventional formulations. Adalat la should be used with caution in patients whose cardiac reserve is poor. Consequently, when nifedipine is either additionally administered or discontinued, monitoring of the quinidine plasma concentration, and if necessary, adjustment of the quinidine dose are recommended.
Therefore any use in pregnancy requires a very careful individual risk benefit assessment and should only be considered if all other treatment options are either not indicated or have failed to be efficacious. Upon co-administration with rifampicin, the bioavailability of nifedipine is distinctly reduced and thus its efficacy weakened. As the outer membrane of the adalat la tablet is not digested, what appears to be the complete tablet may be seen in the toilet or associated with the patients stools. The safety and efficacy of adalat la in children below 18 years has not been established. Each 30 mg tablet also contains 24 mg of sodium chloride (salt) to be taken into consideration by patients on a controlled sodium diet.
In chronic toxicity studies in dogs with treatment lasting up to one year, nifedipine was tolerated without damage at doses up to and including 100 mgkg p. Haemodialysis serves no purpose as nifedipine is not dialysable, but plasmapheresis is advisable (high plasma protein binding, relatively low volume of distribution). This may be more likely when you first start treatment, if you change tablets, or if you have drunk alcohol. The available information is inadequate to rule out adverse drug effects on the unborn and newborn child. Elimination must be as complete as possible, including the small intestine, to prevent the otherwise inevitable subsequent absorption of the active substance.
Symptomatic bradycardia may be treated with atropine, beta-sympathomimetics or a temporary cardiac pacemaker, as required. Co-administration of nifedipine with quinidine may lower plasma quinidine levels, and after discontinuation of nifedipine, a distinct increase in plasma quinidine levels may be observed in individual cases. In patients with hepatic impairment, the elimination half-life is distinctly prolonged and the total clearance is reduced. If you have any further questions on the use of this medicine, ask your doctor. After release and absorption of the last dose the plasma concentration finally declines with an elimination half-life as seen in conventional formulations.
When nifedipine is administered simultaneously with ß-receptor blockers the patient should be carefully monitored, since deterioration of heart failure is also known to develop in isolated cases. Reactions to the drug, which vary in intensity from individual to individual, may impair the ability to drive or to operate machinery (see section 4. Please compare the leaflet preparedrevised date towards the end of the leaflet to establish if there have been any changes. Each tablet is pink and round with a laser hole on one side and marked adalat 30. Nifedipine should not be used during pregnancy unless the clinical condition of the woman requires treatment with nifedipine (see section 4. Consider further doses of activated charcoal every 4 hours if a clinically significant amount of a sustained release preparation has been ingested with a single dose of an osmotic laxative (e. Preclinical data reveal no special hazards for humans based on conventional studies of single and repeated dose toxicity, genotoxicity and carcinogenic potential. After regular intake of grapefruit juice, this effect may last for at least three days after the last ingestion of grapefruit juice. If you need to take adalat la, you should stop breast-feeding before you start to take this medicine. This allows more blood and oxygen to reach the heart and decreases the strain on it.Adalat XL® (nifedipine). 20 mg, 30 mg and 60 mg tablets. What is it used for? This medication is generally used to treat high blood pressure or chest pain ...