So what does OSM stand for? OSM stands for osmotic release. Fortamet and its generic equivalents use single-composition osmotic technology. When you swallow the tablet, water is taken up through the membrane of the pill, which in turn dissolves the drug in the core so it can exit through the laser drilled ports in the membrane. The rate of drug delivery is constant, and will continue as long as there is undissolved drug present in the core tablet.
Once the drug is dissolved, the delivery slowly decreases and eventually stops. Does Fortamet have a generic? What is the MAX dose and available strengths of Fortamet metformin er? Can Fortamet and Glumetza be substituted for one another? Glumetza has no FDA AB-rated equivalents no other drugs have been rated by the FDA as substitutable , therefore, it cannot be substituted with any metformin generic or with Fortamet.
More information on Glumetza can be found here. She does not receive any form of compensation from pharmaceutical manufacturers for the opinions expressed here. Follow her on twitter at orrangemd. Her realm of pharmacy experience includes but is not limited to retail, compounding, and specialty pharmacy. She hand-assembled the GoodRx drug database and has researched virtually every available discount program and savings opportunity.
Once a patient is stabilized on any dose level of metformin hydrochloride extended-release tablets, gastrointestinal symptoms, which are common during initiation of metformin therapy, are unlikely to be drug related.
Later occurrence of gastrointestinal symptoms could be due to lactic acidosis or other serious disease. Patients should be counselled against excessive alcohol intake, either acute or chronic, while receiving metformin hydrochloride extended-release tablets.
Metformin hydrochloride extended-release tablet alone does not usually cause hypoglycemia, although it may occur when metformin hydrochloride extended-release tablet is used in conjunction with oral sulfonylureas and insulin.
When initiating combination therapy, the risks of hypoglycemia, its symptoms and treatment, and conditions that predispose to its development should be explained to patients and responsible family members. Patients should be informed that metformin hydrochloride extended-release tablets must be swallowed whole and not crushed or chewed, and that the inactive ingredients may occasionally be eliminated in the feces as a soft mass that may resemble the original tablet.
During initial dose titration, fasting glucose can be used to determine the therapeutic response. Thereafter, both glucose and glycosylated hemoglobin should be monitored. Initial and periodic monitoring of hematologic parameters e. While megaloblastic anemia has rarely been seen with metformin hydrochloride tablets therapy, if this is suspected, vitamin B12 deficiency should be excluded. Decreases in glyburide AUC and Cmax were observed, but were highly variable.
Furosemide—A single-dose, metformin-furosemide drug interaction study in healthy subjects demonstrated that pharmacokinetic parameters of both compounds were affected by co-administration. No information is available about the interaction of metformin and furosemide when co-administered chronically. Tmax and half-life were unaffected. Nifedipine appears to enhance the absorption of metformin. Metformin had minimal effects on nifedipine.
Drugs that reduce metformin clearance—Concomitant use of drugs that interfere with common renal tubular transport systems involved in the renal elimination of metformin e.
Consider the benefits and risks of concomitant use. In healthy volunteers, the pharmacokinetics of metformin and propranolol, and metformin and ibuprofen were not affected when co-administered in single-dose interaction studies.
Metformin is negligibly bound to plasma proteins and is, therefore, less likely to interact with highly protein-bound drugs such as salicylates, sulfonamides, chloramphenicol, and probenecid, as compared to the sulfonylureas, which are extensively bound to serum proteins. Other—Certain drugs tend to produce hyperglycemia and may lead to loss of glycemic control. These drugs include the thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blocking drugs, and isoniazid.
When such drugs are administered to a patient receiving metformin hydrochloride extended-release tablets, the patient should be closely observed for loss of blood glucose control. When such drugs are withdrawn from a patient receiving metformin hydrochloride extended-release tablets, the patient should be observed closely for hypoglycemia.
Carbonic anhydrase inhibitors—Topiramate or other carbonic anhydrase inhibitors e. Concomitant use of these drugs with metformin hydrochloride Extended-release tablets may increase the risk for lactic acidosis.
Consider more frequent monitoring of these patients. Alcohol—Alcohol is known to potentiate the effect of metformin on lactate metabolism. Warn patients against excessive alcohol intake while receiving metformin hydrochloride Extended-release tablets. These doses are both approximately four times the maximum recommended human daily dose of mg based on body surface area comparisons. No evidence of carcinogenicity with metformin was found in either male or female mice.
Similarly, there was no tumorigenic potential observed with metformin in male rats. There was no evidence of a mutagenic potential of metformin in the following in vitro tests:
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