pravastatin sodium
Meaning of pravastatin sodium: The water-loving member of the statin family, which is why it sidesteps most of the drug interactions that trouble the others.
Definition of pravastatin sodium
Pravastatin sodium is a cholesterol-lowering drug of the statin class, taken as a tablet to reduce low-density lipoprotein and to lower the risk of heart attack and stroke. It blocks the liver enzyme that sets the pace of cholesterol manufacture, which prompts liver cells to pull more cholesterol out of the blood. Unlike most statins it dissolves in water rather than in fat.
How does blocking an enzyme lower blood cholesterol?
Not mainly by making less of it. Most of the cholesterol in the body is manufactured rather than eaten, and the liver runs that production line. Blocking the rate-setting enzyme in the line leaves liver cells short, and they respond by building more receptors on their surface to catch cholesterol-carrying particles out of the blood. That second step does most of the work. The fall in low-density lipoprotein comes largely from clearing particles out of the circulation rather than from reduced manufacture. Statins also make deposits in an artery wall less likely to rupture, an effect only loosely tied to how far the cholesterol number drops.
What sets pravastatin apart from other statins?
| Property | Pravastatin | Several other statins |
|---|---|---|
| Solubility | Dissolves in water | Dissolves in fat |
| Entry into liver cells | Carried in by a transporter | Crosses membranes freely |
| Handled by the CYP3A4 enzyme | No | Yes for some of them |
| Grapefruit and antifungal interactions | Minimal | A recognized concern |
The practical consequence is fewer interactions. Pravastatin leaves the body largely unchanged instead of being processed by the liver enzyme system that many other drugs occupy, so combinations that push the level of simvastatin or lovastatin into dangerous territory tend to leave it alone. Being water-loving also means it enters muscle and other tissues less freely than the fat-soluble members of the class.
What has to be watched?
Muscle symptoms dominate the conversation. Aching and weakness are reported often, while genuine breakdown of muscle tissue with kidney injury is rare and becomes likelier in certain drug combinations. Liver enzymes in the blood may rise, usually without consequence. Statins are avoided in pregnancy. Small rises in blood sugar and in new diabetes have been recorded across the class, an effect that has not displaced the benefit for people at real cardiovascular risk. The original brand name is Pravachol. Descriptions calling this drug a chemosensitizer reflect laboratory experiments rather than any approved use in cancer.
Also known as
Used in a sentence
Pravastatin sodium was continued at the same dose after the lipid panel was reviewed.
Good to know
Pravastatin dissolves in water and largely escapes the liver enzyme system that processes several other statins, so interactions that make simvastatin or lovastatin hazardous have much less effect on it.