I have been taking Lasix for the last couple of months to combat the swelling in my feet and legs that other medications have caused. I take the corresponding amounts of potassium supplements needed to counter act a potassium deficiency, which water pills can cause. At 40mg a day I don't seem to have any adverse reactions, but when I have to take the 60mg or 80mg I start to get cramp-like pains in the arches of my feet. I know that a potassium deficiency can cause cramps, but I don't want to OD on potassium because that can cause arrhythmia... any I don't need any more health problems. Any suggestions?
15 Nov 2009
This is a fine line we are talking about. If you have been on Lasix for two weeks have another blood test taken to see your current potassium level is correct. Everyone responds differently. I would be careful with taking more than what the doctor ordered as lasix is hard on the kidneys. Many people use the thyizides medications as they do the same job without hurting the kidneys. ie: Hydrochlorothiazide.
You might also drink tonic water to calm the cramps too. Drink it when you have the cramps.
15 Nov 2009
Please consult your physician immediately. One potentially-harmful side effect of Lasix is that it decreases serum potassium levels. Cramps is one of the first indications of low potassium. The big issue with potassium is that is the primary electrolyte involved in the conduction system of the heart--bottom line is that too much or too little potassium can cause very potentially-debilitating dysrhythmias. Do not, however go out and buy some potassium supplements and start taking them without consulting your physician. He will likely order blood work to determine your exact potassium level, and advise you on taking a supplement or increasing dietary intake of potassium based on your labs. All patients are individuals, and their care/treatment must be individualized according to their needs. Don't freak out--But DO call your doctor. Accurate assessment of your K+ levels via bloodwork is the only safe way to address this issue.
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