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Mylotat is a brand name for **atorvastatin**.
## Overview
Atorvastatin is a statin medication used to lower cholesterol and reduce the risk of cardiovascular events. It works by inhibiting HMG-CoA reductase, an enzyme involved in cholesterol synthesis.
## Primary Indications
* Hyperlipidemia (primary and mixed dyslipidemia)
* Hypertriglyceridemia
* Prevention of cardiovascular disease in patients with risk factors for coronary heart disease
## Adult Dosing
* **Hyperlipidemia/Dyslipidemia:** Recommended starting dose is 10 mg to 20 mg once daily. Titrate as needed based on LDL-C response and patient tolerance. Usual maintenance dose is 10 mg to 80 mg once daily.
* **Prevention of Cardiovascular Disease:** Recommended dose is typically 10 mg once daily.
*Maximum dose:* 80 mg once daily.
## Pediatric Dosing
* **Children and adolescents 10 to 17 years of age with heterozygous familial hypercholesterolemia:** Starting dose is 10 mg once daily. Doses up to 80 mg daily have been used.
Dosing in younger children is not established.
## Dose Adjustments
* **Renal Impairment:** No dose adjustment is generally required.
* **Hepatic Impairment:** Use with caution. In patients with moderate hepatic impairment, consider a lower starting and maintenance dose. Contraindicated in active liver disease.
## Contraindications
* Active liver disease or unexplained persistent elevations of serum transaminases (greater than 3 times the upper limit of normal).
* Known hypersensitivity to atorvastatin or any component of the formulation.
* Pregnancy and breastfeeding.
## Adverse Effects
* **Common:** Myalgia, arthralgia, diarrhea, nausea, headache, nasopharyngitis.
* **Serious:** Myopathy, rhabdomyolysis, hepatotoxicity, memory impairment, hyperglycemia.
## Key Drug Interactions
* **CYP3A4 Inhibitors:** (e.g., itraconazole, ketoconazole, clarithromycin, ritonavir) Increased risk of myopathy and rhabdomyolysis. Dose of atorvastatin should be reduced.
* **CYP3A4 Inducers:** (e.g., rifampin) May decrease atorvastatin levels.
* **Gemfibrozil, Fenofibrate:** Increased risk of myopathy.
* **Colchicine:** Increased risk of myopathy.
* **Antacids:** May decrease atorvastatin plasma concentrations. Administer antacids at least 4 hours apart from atorvastatin.
* **Oral Contraceptives:** May increase AUC of ethinyl estradiol and norgestrel.
## Monitoring
* **Lipid Panel:** Before initiating therapy and periodically thereafter (typically within 4-12 weeks) to assess efficacy.
* **Liver Function Tests (LFTs):** Baseline and as clinically indicated. Monitor for signs and symptoms of liver injury.
* **Creatine Kinase (CK):** Monitor if myopathy is suspected.
## Clinical Pearls
* Take atorvastatin at any time of day, with or without food.
* Advise patients to report unexplained muscle pain, tenderness, or weakness, especially if accompanied by fever or malaise.
* Grapefruit juice can increase atorvastatin levels; consumption should be limited or avoided.
* Consider the risk of hyperglycemia and diabetes development in patients with risk factors.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information, local protocols, and patient-specific factors before making any clinical decisions.
