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Sensipar (cinacalcet) is a calcimimetic agent that increases the sensitivity of the calcium-sensing receptor to activation by extracellular calcium. Sensipar tablets contain the hydrochloride salt of cinacalcet. Its empirical formula is C22H22F3N•HCl with a molecular weight of 393.9 g/mol (hydrochloride salt) and 357.4 g/mol (free base). It has one chiral center having an R-absolute configuration. The R-enantiomer is the more potent enantiomer and has been shown to be responsible for pharmacodynamic activity.
The hydrochloride salt of cinacalcet is a white to off-white, crystalline solid that is soluble in methanol or 95% ethanol and slightly soluble in water.
Sensipar tablets are formulated as light-green, film-coated, oval-shaped tablets for oral administration in strengths of 30 mg, 60 mg, and 90 mg of cinacalcet as the free base equivalent (33 mg, 66 mg, and 99 mg as the hydrochloride salt, respectively).
The hydrochloride salt of cinacalcet is described chemically as N-[1-(R)-(-)-(1-naphthyl)ethyl]-3-[3-(trifluoromethyl)phenyl]-1-aminopropane hydrochloride and has the following structural formula:
The following are the inactive ingredients in Sensipar tablets: pre-gelatinized starch, microcrystalline cellulose, povidone, crospovidone, colloidal silicon dioxide and magnesium stearate. Tablets are coated with color (Opadry®II green), clear film coat (Opadry®clear), and carnauba wax.
What are the possible side effects of cinacalcet (Sensipar)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
- numbness or tingly feeling around your mouth, fast or slow heart rate, muscle tightness or contraction, overactive reflexes;
- seizure (convulsions);
- feeling short of breath, even with mild exertion;
- swelling, rapid weight gain; or
- feeling like you might pass out.
Less serious side effects may...
What are the precautions when taking cinacalcet (Sensipar)?
Before taking cinacalcet, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: low levels of calcium in the blood (hypocalcemia), seizures.
Very low levels of calcium can affect the heart rhythm (QT prolongation, ventricular arrhythmias). This risk may be increased if you have certain conditions or are taking drugs that can affect the heart rhythm. Before taking cinacalcet, tell your doctor of all the drugs you take and if you have heart rhythm problems or other heart problems (such as heart...
Last reviewed on RxList: 2/6/2017
This monograph has been modified to include the generic and brand name in many instances.
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