Alternatives to Rivastigmine If You Can't Fill Your Prescription

When rivastigmine is unavailable at your pharmacy — or when side effects make it difficult to tolerate — it's natural to wonder what other options exist. The good news is that several FDA-approved alternatives treat the same conditions rivastigmine does: dementia associated with Alzheimer's disease and Parkinson's disease. Here's what you need to know about each alternative, and how to have an informed conversation with your doctor.

Important: Never Switch Dementia Medications Without Your Doctor's Guidance

Dementia medications require careful dose titration, and abruptly stopping rivastigmine can cause a worsening of cognitive symptoms. Always contact your prescribing doctor before changing, stopping, or switching medications. This guide is for informational purposes to help you understand your options — not to replace medical advice.

1. Donepezil (Aricept) — The Most Commonly Prescribed Alternative

Donepezil (brand name Aricept) is the most widely prescribed cholinesterase inhibitor in the United States. Like rivastigmine, it works by preventing the breakdown of acetylcholine in the brain. However, donepezil selectively inhibits only acetylcholinesterase, while rivastigmine inhibits both acetylcholinesterase and butyrylcholinesterase.

FDA-approved for: All stages of Alzheimer's dementia (mild, moderate, and severe)

Dosing: 5–10 mg once daily (tablet); also available as an orally disintegrating tablet and a once-weekly transdermal patch (Adlarity)

Advantage over rivastigmine: Once-daily dosing; cheaper generic widely available; generally well-tolerated

Cash price: Generic donepezil is very affordable — often under $10/month with a GoodRx coupon

Studies show donepezil and rivastigmine have similar effectiveness. If one doesn't work well for you or causes intolerable side effects, your doctor may try the other.

2. Galantamine (Razadyne) — A Dual-Mechanism Option

Galantamine (brand name Razadyne) is another cholinesterase inhibitor, but with a unique twist: it also modulates nicotinic acetylcholine receptors, potentially enhancing its effects on cognition.

FDA-approved for: Mild-to-moderate Alzheimer's dementia

Dosing: Available as immediate-release (taken twice daily) and extended-release (once daily); typical range is 8–24 mg/day

Note: Not FDA-approved for Parkinson's disease dementia (unlike rivastigmine)

3. Memantine (Namenda) — A Different Mechanism, Often Combined

Memantine works completely differently from the cholinesterase inhibitors above. It's an NMDA receptor antagonist that regulates glutamate activity in the brain, helping prevent overstimulation that contributes to cognitive decline.

FDA-approved for: Moderate-to-severe Alzheimer's dementia

Dosing: 5–20 mg/day (immediate-release) or 7–28 mg/day (extended-release); can be used alone or combined with rivastigmine or donepezil

Key advantage: Often used in combination with a cholinesterase inhibitor for additive benefit; generic is inexpensive

4. Namzaric (Donepezil + Memantine) — Combination in One Capsule

Namzaric is a fixed-dose combination of donepezil and memantine extended-release in a single capsule. It's FDA-approved for moderate-to-severe Alzheimer's disease and is taken once daily at bedtime. This is a convenient option for patients who would otherwise need to take two separate medications.

Comparison Table: Rivastigmine vs. Alternatives

Here is a quick comparison of your main options:

Rivastigmine (Exelon): Dual AChE/BuChE inhibitor; only one FDA-approved for Parkinson's dementia; patch option; BID oral dosing or once-daily patch

Donepezil (Aricept): Selective AChE inhibitor; approved for all Alzheimer's stages; once-daily; cheapest generic option

Galantamine (Razadyne): Dual mechanism; once or twice daily; mild-to-moderate Alzheimer's only; not for Parkinson's dementia

Memantine (Namenda): NMDA antagonist; different mechanism; used for moderate-to-severe stages; often combined with an AChE inhibitor

What to Tell Your Doctor When Asking About Switching

When you contact your prescriber about switching from rivastigmine, be ready to share:

Which pharmacies you've already tried and what they said

How many doses have been missed (if any)

The patient's current stage of dementia and any tolerability concerns with rivastigmine

Whether the patient has Alzheimer's or Parkinson's disease dementia (important — not all alternatives are approved for Parkinson's)

Still Trying to Find Rivastigmine Itself?

Before switching, it's worth trying to locate rivastigmine at a nearby pharmacy. Use medfinder.com to have pharmacies called on your behalf — it's much faster than calling around yourself. See also our guide on how to find rivastigmine in stock near you for a full list of strategies.