Calcitriol (Rocaltrol) is a form of vitamin D that's used to raise blood calcium levels; it's commonly used in people with kidney and parathyroid hormone problems. Side effects of calcitriol (Rocaltrol) are similar to the effects you can get when you take too much vitamin D, which includes muscle weakness, feeling tired or sleepy, or upset stomach. Calcitriol (Rocaltrol) comes as capsules and a liquid that you take by mouth. It's available as a brand-name and generic medication.
Low calcium in people on dialysis
Secondary hyperparathyroidism in people not yet on dialysis
Low calcium in people with hypoparathyroidism or pseudohypoparathyroidism
Calcitriol (Rocaltrol) is the active form of vitamin D. It raises your vitamin D levels, which helps your body absorb more calcium. This raises your blood calcium levels.
Source: DailyMed
Side effects that you should report to your care team as soon as possible:
Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):
First-choice treatment option for low calcium levels in people with hypoparathyroidism or severe kidney problems
Available as a lower-cost generic medication
Can be used in young children
Need to get blood tests done often to check your calcium levels
Best to keep the amount of calcium you eat consistent (eat the same amount each day) while you're taking calcitriol (Rocaltrol)
Can interact with a lot of medications, such as certain antacids, steroids, and diuretics
Take calcitriol (Rocaltrol) at the same time every day. You should only stop taking the medication if your provider tells you to. If your calcium levels are too high, they might ask you to stop the medication for a period of time.
You'll need to have your blood drawn about twice a week when you're first starting calcitriol (Rocaltrol) and anytime your dose changes. Your providers want to make sure you're getting the right dose of medication to help with your medical condition.
Take calcitriol (Rocaltrol) exactly as prescribed and avoid other vitamin D supplements during treatment. Taking too much vitamin D can cause dangerously high levels of calcium.
Try to be consistent about the amount of calcium-rich foods you eat while you're taking calcitriol (Rocaltrol). This will help make sure your calcium levels stay within normal limits. Ask your provider how much calcium you should be getting per day.
If you're on dialysis, avoid antacids that contain magnesium, such as Mylanta and Milk of Magnesia. Taking these antacids with calcitriol (Rocaltrol) can cause high levels of magnesium, which can lead to serious breathing or heart problems.
If you're using the oral solution of calcitriol (Rocaltrol), keep it in its original container and store it at room temperature. The medication will come with disposable oral dispensers. Each oral dispenser is meant to be used once to measure and take the dose and then thrown away.
Calcitriol (Rocaltrol) can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.
Risk factors: High daily calcium intake
Calcitriol (Rocaltrol) is a potent (strong) form of vitamin D. Taking too much can lead to high levels of calcium in the blood, which can be dangerous. High levels of calcium can damage your kidneys and blood vessels. Keep your calcium intake consistent; eat the same amount of calcium-rich foods or take the same amount of calcium supplements every day. Let your provider know if you notice any signs of high calcium levels, such as a metallic taste in your mouth, dry mouth, muscle or bone pain, or a headache. Your provider can order labs to check your calcium levels and start treatment to lower your calcium levels, if needed.
Calcitriol (Rocaltrol) can interact with a number of medications. These medications can include ketoconazole, cholestyramine (Prevalite), corticosteroids, phosphate binders, magnesium-containing supplements or antacids, and diuretics like hydrochlorothiazide. Some medications can raise the levels of calcitriol (Rocaltrol), vitamin D, calcium, or other electrolytes; other medications can lower these levels. Make sure all of your providers have a full list of medications and supplements you're taking so they can adjust your dose based on possible drug interactions.
Adults: The typical starting dose is 0.25 mcg by mouth daily. Your provider will check your blood calcium levels throughout therapy. They might raise your dose if your levels remain low.
Children: Your child's dose will depend on their age, weight, and the reason they're taking calcitriol (Rocaltrol).
Having high levels of calcium or vitamin D
Low calcium in people on dialysis
Secondary hyperparathyroidism in people not yet on dialysis
Low calcium in people with hypoparathyroidism or pseudohypoparathyroidism
Hypoparathyroidism (low parathyroid hormone levels)
Familial hypophosphatemia (genetic condition causing low phosphate levels)
Vitamin D-resistant rickets (weakening of the bones caused by low vitamin D)
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MedlinePlus. (2022). Pseudohypothyroidism.
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National Kidney Foundation. (n.d.). Secondary hyperparathyroidism.
You and Your Hormones. (2021). Vitamin D.
You and Your Hormones. (2022). Parathyroid glands.
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