Evolocumab is an injectable cholesterol drug that lowers LDL by roughly 60%, far more than any pill, by blocking a protein called PCSK9. Most people end up on it because their LDL is still too high despite a statin (often plus ezetimibe) and they need a much bigger lever, or they genuinely can't tolerate statins and need strong LDL lowering without them. It's sold as Repatha, given as a self-injection every two weeks or once a month.

This is one of the few lipid drugs with hard outcome data behind it, not just a number on a lab report. In people with existing heart disease it cuts the risk of heart attacks, strokes, and the procedures that follow, and as of late 2025 it's also been shown to prevent first events in high-risk people who haven't had one yet. You won't feel anything taking it, the effect is entirely on your bloodwork and your long-term risk, and it's well tolerated. The main practical downsides are that it's an injection and it's expensive.

Deep-dive

Dosage:

• Two equivalent regimens: 140 mg every 2 weeks, or 420 mg once monthly. Both lower LDL by about the same amount, pick based on what you'll actually remember and stick to. Many people prefer the monthly dose for convenience
• Given as a subcutaneous self-injection, into the abdomen, thigh, or back of the upper arm. The 140 mg dose comes as a single prefilled autoinjector or syringe. The 420 mg monthly dose is either three 140 mg injections done back-to-back within 30 minutes, or a single on-body infusor
• Rotate injection sites and don't inject into skin that's bruised, red, tender, or hard. Let the pen warm to room temperature before injecting, it stings less and is more comfortable
• It's almost always an add-on, not a replacement. Keep your statin (and ezetimibe, if you're on it) going, evolocumab stacks on top. The exception is genuine statin intolerance, where it's used without a statin, often alongside ezetimibe
• Give it 4-8 weeks before checking a lipid panel. The LDL effect shows up fast but you want a stable read. If you're on the monthly 420 mg dose, time the blood draw just before your next injection, since levels dip slightly across the month
• Same dose regardless of sex, age, or kidney function. No adjustment needed. People on lipid apheresis sometimes start at 420 mg every 2 weeks to match the apheresis schedule, that's a specialist decision
• Storage matters: it's a biologic, keep it refrigerated. It can sit at room temperature but only for up to 30 days, then it has to be discarded
• This is a long-term drug. LDL returns to baseline within weeks of stopping, the same way it does with statins, so it's only worth taking if you plan to stay on it

Here's what you can expect:

You will not feel anything. Evolocumab has no perceptible day-to-day effect, no energy change, nothing you'd notice. The only evidence it's working is a blood test, and on that test the change is dramatic: LDL roughly 60% lower, usually landing in the 30-40 mg/dL range, showing up within the first few weeks and stable from then on.

The thing you might notice is at the injection site, mild redness, an itch, or tenderness for a day or so. It's the most common real effect and usually fades as you get used to the technique.

Everything else is invisible and long-term: a lower heart attack and stroke risk that compounds the longer you stay on it, and, if it were imaged, slow regression of arterial plaque. This is a number-mover and a risk-mover, not something you experience.

Side effects & risks: