Low blood pressure or hypotension is a condition in which blood pressure becomes so low that the blood flow to the organs in the body, which causes symptoms like dizziness, fainting, nausea, vomiting, and chest pain. Common causes are heart disease, medications, and dehydration. Treatment for hypotension depends upon the patients health. Medscape - Heart failure, atrial fibrillation dosing for Lanoxin (digoxin), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information. After the start of digoxin therapy and at regular intervals to ensure that drug levels are within therapeutic range (not too low or too high as to be toxic) Digoxin is used to treat heart failure, usually along with other medications. It is also used to treat a certain type of irregular heartbeat (chronic atrial fibrillation). Digoxin toxicity, also known as digoxin poisoning, is a type of poisoning that occurs in people who take too much of the medication digoxin or eat plants such as foxglove that contain a similar substance. Well the usual maintenance dose is 0.25 mg/day, unless you are very old or have renal disease. It seems that she is on a lower dose for some reason, which may be fine. Magnesium and potassium are elements in the body that are important for muscle and heart function. Certain conditions can cause the blood levels of either or both of them to be low. If a red-top tube is used, transfer separated serum to a plastic transport tube. Blood specimen must be drawn six to eight hours after the administration of the last dose (levels drawn earlier than six hours after a dose will be artificially elevated). More gradual attainment of digoxin levels can also be accomplished by beginning an appropriate maintenance dose. The range of percentages provided in Table 2 (2.4 Estimate of Daily Maintenance Dose) can be used in calculating this dose for patients with normal renal function. Search Harvard Health Publishing. What can we help you find? Enter search terms and tap the Search button. Both articles and products will be searched.