Drug Information Guide
HMG-CoA reductase inhibitor (statin)·#15 most prescribed in Canada

Lipitoratorvastatin calcium

Also known as: Atorvastatin (multiple Canadian generics)

Lipitor (atorvastatin) lowers LDL cholesterol and reduces heart attack and stroke risk. Learn dosing, side effects, and grapefruit interactions at Pill4Me Chilliwack.

Prescriptions (Canada 2024)

3,300,000 prescriptions

Drug class

HMG-CoA reductase inhibitor (statin)

DIN (Canada)

02230711, 02230713 +2 more

What is Lipitor?

Lipitor is used to lower LDL (bad) cholesterol and triglycerides, and to raise HDL (good) cholesterol in adults and children over 10 with hereditary high cholesterol. It significantly reduces the risk of heart attack, stroke, and the need for procedures to open blocked arteries in patients at elevated cardiovascular risk.

How it works

Atorvastatin works by blocking HMG-CoA reductase, the key enzyme your liver uses to produce cholesterol. With this enzyme blocked, the liver compensates by increasing the number of LDL receptors on its surface, pulling more LDL cholesterol out of the bloodstream. This is why statins lower LDL so effectively — they work on the liver, not on dietary cholesterol directly.

Forms & strengths

Tablets: 10 mg, 20 mg, 40 mg, 80 mg. Generic atorvastatin is widely available and bioequivalent to Lipitor.

How to take it

Taken once daily at any time of day, with or without food. Unlike older statins, atorvastatin can be taken in the morning or evening — its long half-life (14 hours) means timing is flexible. Typical starting dose is 10–20 mg; high-risk patients (post-heart attack) are often started at 40–80 mg. Take at the same time each day for consistency.

Side effects

Common side effects

  • Muscle aches, pain, stiffness, or weakness — most common reason patients stop statins
  • Nausea, diarrhea, or constipation
  • Headache
  • Joint pain
  • Blood sugar elevation — small increased risk of new-onset type 2 diabetes with long-term use
  • Elevated liver enzymes on blood tests (usually mild, often temporary)

Serious side effects — seek care immediately

  • Rhabdomyolysis (severe muscle breakdown) — muscle pain with dark, brown, or tea-coloured urine means go to emergency immediately
  • Liver toxicity — rarely causes clinically significant liver damage; routine liver enzyme monitoring not required unless symptoms occur
  • Immune-mediated necrotizing myopathy (IMNM) — a rare autoimmune muscle condition that can persist even after stopping the statin
  • Interstitial lung disease (very rare) — persistent cough, shortness of breath — report to doctor

Important warnings

Avoid grapefruit and grapefruit juice — unlike rosuvastatin, grapefruit significantly increases atorvastatin levels (by up to 2.5-fold at high doses) because it blocks the same liver enzyme that metabolizes atorvastatin. Limit grapefruit juice to no more than 250 mL (one small glass) per day, or switch to orange juice

Pregnancy must be avoided — stop atorvastatin immediately if you become pregnant and contact your doctor

Report unexplained muscle pain, tenderness, or weakness promptly — especially if accompanied by dark urine or fever

Do not stop without speaking to your doctor — stopping a statin after a heart attack increases risk of a second event

Certain antibiotics (clarithromycin, erythromycin) significantly raise atorvastatin levels when taken together — your pharmacist will check for this interaction

Who should not take it

  • Active liver disease or unexplained persistent elevation of liver enzymes
  • Pregnancy — statins cause fetal harm; use effective contraception while on atorvastatin
  • Breastfeeding
  • Current use of certain medications that dramatically increase atorvastatin levels (some HIV antivirals, cyclosporine — dose adjustment or alternative required)
  • Previous serious muscle reaction (rhabdomyolysis) to any statin

Drug interactions

Grapefruit juice (large amounts) increases atorvastatin exposure significantly — limit intake. Cyclosporine, lopinavir/ritonavir, and other strong CYP3A4 inhibitors markedly increase levels — dose adjustment or drug switch needed. Gemfibrozil increases rhabdomyolysis risk — combination generally avoided. Clarithromycin and erythromycin: during a short antibiotic course, temporarily hold atorvastatin if dose is high, or use azithromycin instead. Warfarin: modest INR increase — monitor when starting or dose-adjusting atorvastatin.

BC PharmaCare coverage

Lipitor (atorvastatin) may be covered under BC PharmaCare depending on your plan. Covered under Fair PharmaCare for eligible BC residents. Generic atorvastatin is preferred under the Low Cost Alternative (LCA) program — your pharmacist can switch you to the covered generic automatically at no extra cost. Coverage amounts vary — Fair PharmaCare covers 70–100% after your annual deductible depending on your income. Call us at 604-705-3644 and we'll check your specific coverage in minutes. BC PharmaCare covers the generic version at 100% of the approved price. If you choose the brand name instead of the generic, you pay the difference in cost out of pocket. Your pharmacist can dispense the generic automatically unless your doctor has specified 'no substitution' on the prescription. Coverage information is a general guide only. Your actual coverage depends on your PharmaCare plan and eligibility. We check coverage for free — call 604-705-3644 or ask at the counter.

Coverage details change — confirm with your Pill4Me pharmacist or visit BC PharmaCare.

Frequently asked questions

Should I take atorvastatin at night or in the morning?
Unlike simvastatin and lovastatin (which should be taken at night because cholesterol production peaks overnight), atorvastatin has a long half-life and works effectively regardless of when you take it. Morning or evening are both fine — the most important factor is consistency. Pick a time that fits your routine so you do not forget.
How much does grapefruit actually matter with Lipitor?
With atorvastatin, grapefruit matters more than it does with rosuvastatin. Grapefruit (and its juice) blocks CYP3A4 — the liver enzyme that breaks down atorvastatin. This can increase atorvastatin exposure by up to 250%, raising the risk of muscle problems. The official guidance is to limit grapefruit juice to no more than one small glass (250 mL) per day. Occasional grapefruit sections are less of a concern than drinking large amounts of juice daily. If grapefruit is a staple of your diet, discuss switching to rosuvastatin with your doctor.
Can I take a break from my statin if I feel fine?
Not without speaking to your doctor. Statins work continuously to keep LDL cholesterol low and stabilize arterial plaques. If your cholesterol looks normal on your blood test, it is likely because the statin is working — not because you no longer need it. Stopping without medical guidance, especially after a heart attack or stroke, significantly increases risk of a future event.
What should I do if I have muscle pain on atorvastatin?
Report any unexplained muscle aching, weakness, or tenderness to your pharmacist or doctor, especially if it is in multiple muscle groups or accompanied by dark urine. Your doctor may order a CK (creatine kinase) blood test to check for muscle damage. Mild, transient aches are common and often resolve with time or a dose reduction. Severe muscle symptoms, or any cola-coloured urine, require urgent medical evaluation.
How long before atorvastatin lowers my cholesterol?
You will see meaningful LDL reduction within 2–4 weeks of starting atorvastatin. The full effect is typically seen at 4–6 weeks. Your doctor will usually check your lipid panel 6–12 weeks after starting or changing your dose. If your LDL target is not reached, the dose can be increased or a second medication added.

Related medications

Crestor (rosuvastatin calcium)Eliquis (apixaban)Norvasc (amlodipine besylate)

Questions about Lipitor?

Our Chilliwack pharmacists can review your medications, check for interactions, and answer any questions — at no charge.

Call 604-705-3644Transfer my prescription →
Medical disclaimer: This page is for general educational purposes only and does not constitute medical advice. Always consult your pharmacist or prescriber before making any changes to your medications. BC PharmaCare coverage criteria are subject to change.