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Horizant Medicare coverage

Used for Postherpetic Neuralgia, Restless Leg Syndrome

Horizant Coupon - Horizant 600mg tablet

Horizant (gabapentin enacarbil) is FDA-approved to treat restless leg syndrome (RLS) and nerve pain from shingles in adults. This medication belongs to the drug class called antiepileptics. Horizant (gabapentin enacarbil) is an extended-release tablet that's taken by mouth. It's generally taken once per day for RLS and twice per day for shingles-related nerve pain. Side effects include sleepiness, dizziness, and headache.

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$544.00
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Medicare: Your GoodRx guide

Learn the ins and outs of Medicare with our comprehensive guide that covers eligibility, coverage, costs, and more.

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Common Medicare glossary terms
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Annual Notice of Change (ANOC):

The Medicare Annual Notice of Change (ANOC) is a letter for people enrolled in Medicare Advantage plans and anyone with Medicare Part D prescription coverage. People with Medicare Advantage or original Medicare (Part A and/or Part B) can have Part D plans. The ANOC informs enrollees about any changes to their benefits for the coming coverage year. By law, Medicare Advantage and Part D plans must send the ANOC to enrollees by September 30 — which is before the annual Medicare open enrollment period of October 15 to December 7. Even if you have the same plan, your benefits could change year to year.

Premium:

A premium is the cost of having a health insurance plan and is usually paid monthly. Medicare enrollees may pay several premiums. Most people don’t pay anything for Part A hospital insurance, but some people do depending on how long they worked and paid taxes. For outpatient and preventive coverage, the Part B standard premium is $185 a month in 2025, but people with higher incomes pay more. Your premium for Medicare Advantage plans will vary, but even so-called “zero premium” plans require you to pay your Part B premium. Part D premiums range in price, but the average is about $47 a month in 2025. If you have original Medicare and a Medigap supplement plan, you have an additional premium for that coverage.

Deductible:

A deductible is the amount you pay out of pocket before your Medicare plan begins cost-sharing. In 2025, the Part A deductible is $1,676 per benefit period. The Part B deductible is $257 for the year, but you can access certain preventive care — including some vaccines — without meeting your deductible. Medicare Advantage deductibles vary and your Part D deductible can’t exceed $590 in 2025.

Out-of-pocket limit:

Original Medicare has no annual out-of-pocket maximum. Medicare Advantage plans have out-of-pocket limits. In 2025, they are $9,350 for in-network covered services and $14,000 for in-network and out-of-network covered services combined.

Medicare Prescription Payment Plan:

Starting January 1, 2025, anyone with Part D coverage had the option to use the Medicare Prescription Payment Plan for their out-of-pocket medication costs instead of paying upfront at the pharmacy. This plan doesn’t provide savings, but allows you to spread prescription costs — including your deductible — over the year. Making payments can be particularly helpful for people who may skip or delay picking up prescriptions because of high costs early in the year. Also in 2025, the Part D out-of-pocket limit dropped to $2,000.

Initial coverage phase:

After a Medicare enrollee meets the Part D deductible (if the plan has one), the health insurance begins cost sharing. The initial coverage phase means you pay coinsurance or a copay for covered prescriptions.

Catastrophic phase:

When you reach the $2,000 out-of-pocket maximum, your Part D plan pays for 100% of covered medications for the rest of the year.

Medication ready
How to save on drugs with Medicare

Medicare Part D is the part of Medicare that helps cover prescription medications, including both brand name and generic. It also includes coverage for certain vaccines that aren’t covered by Part B, as well as some medical supplies.

Even with Medicare Part D coverage, you may still have out-of-pocket costs such as premiums, deductibles, copayments, and coinsurance. As of 2025, Medicare Part D plans include a $2,000 annual out-of-pocket cap. Once you reach this limit, your plan covers the full cost of your covered medications for the rest of the year.

Still, there are several ways to reduce your prescription medication cost. From GoodRx coupons to patient assistance programs, here are ways you can save money on the medications you need.

1. See if you qualify for Medicare’s Extra Help program

The Medicare Extra Help/Low-Income Subsidy program is a federally funded program for people covered under a Medicare Part D plan. It helps reduce enrollees’ out-of-pocket costs by limiting their deductibles and copays. To qualify, your income and assets fall below a certain limit.

If you’re eligible, you may receive:

  • No monthly premiums for Medicare Part D

  • No Medicare Part D deductible

  • Low copays for prescription medications

2. Use GoodRx coupons

You can’t combine GoodRx coupons with Medicare, but you can choose to use a coupon instead of your insurance if it results in a lower price.

Here’s how to download a GoodRx coupon:

  1. Go to the GoodRx website, or download the GoodRx app on your phone.

  2. Search for your prescription medication.

  3. Enter your prescribed dose and quantity, then set your location.

  4. Compare prices across different pharmacies in your area.

  5. Click “Find the lowest prices” or press “Enter.”

  6. You can have the coupon sent by text or email, or print it out.

  7. To apply the discount, show the coupon at the pharmacy when you fill your prescription. Ideally, this is done at drop-off before the prescription is filled.

3. Consider the Medicare Prescription Payment Plan

The Medicare Prescription Payment Plan is a new program that can help make paying for medications more manageable. It’s open to anyone with a standalone Part D plan or those with Medicare Advantage plans that offer prescription medication coverage.

There is no cost to participate in the Medicare Prescription Payment Plan and participation is voluntary. Instead of paying for the total cost of your medications up front at the pharmacy, the payment plan allows you to spread the cost into smaller payments during the year. If you join, you will continue to pay your premium every month as well as an additional monthly amount on your payment plan. It’s a good idea to review how the Medicare Prescription Payment Plan works to determine if it’s right for you.

4. Compare Part D plans during open enrollment

Medicare open enrollment, which takes place every year from October 15 to December 7, is your chance to switch plans if another option offers better prescription medication coverage or lower costs. Plan costs and coverage details can change each year, so it’s important to review your options.

Here are some steps to help you compare plans:

  1. Make a list of all your medications and what dosages you take.

  2. Enter the names of your prescription medications to see which plans offer the best coverage.

  3. Look at premiums, deductibles, and medication costs for each plan. Plans usually change their formularies, premiums, and copays annually.

  4. Check if your preferred pharmacy is in each plan's network.

5. Get a 90-day supply

Opting for a 90-day supply instead of a monthly refill of your medication might help reduce your long-term out-of-pocket costs. Many insurance plans offer lower copays or bulk pricing for 3-month prescriptions.

If your medication is covered under your plan, see if your insurer’s mail-order or specialty pharmacy provides savings on a 90-day supply. If they do, ask your prescriber to write a prescription for a 90-day quantity to take advantage of these potential savings.

6. Ask about the generic version of your medication

Some medications have a generic version, and they generally cost less than the brand-name prescriptions. Generic medications are just as safe and effective as brand-name medications, so it’s an option worth considering to reduce your cost. Ask your prescriber about switching to a generic version of your medication to save money.

7. Consider lower-cost alternative medications

There may be other medications that help manage your condition, and they may cost less. If your medication is costly or not covered by your insurance, talk to your prescriber about lower-cost alternatives that might be a good option for you. Alternatives might have better insurance coverage or lower costs.

8. Learn more about patient assistance programs

Patient assistance programs (PAPs) offer free or low-cost medications to uninsured and low-income consumers. These programs, which primarily offer savings on brand-name medications, are usually run by private pharmaceutical companies or nonprofit organizations. You must meet certain qualifications and complete paperwork to receive savings from PAPs. However, some PAPs exclude Medicare recipients, so it’s important to review the program’s rules and requirements carefully.

9. Check state-funded resources

Depending on where you live, your state may offer programs to help you navigate prescription medication costs. A good place to start is your local Department of Aging. This U.S. Department of Health and Human Services office can help you find the best Medicare plan for the coverage you need.

Some states even have their own cost-saving programs for older adults. For example, Pennsylvania runs PACE and PACENET. These programs help eligible residents get prescription medications at reduced costs.

Alternatively, you can find out if your state has a State Pharmaceutical Assistance Program by using Medicare’s search tool. These programs are state-run and help qualifying residents pay for prescription medications.

10. Use a health savings account to pay for prescription medications

Although you can’t contribute to a health savings account (HSA) after enrolling in Medicare, you can still use any remaining funds in your account to pay for qualified medical expenses. An HSA allows you to use tax-free dollars to pay for eligible prescription medications. The money in your account does not expire so you can use your funds at any time to reduce your out-of-pocket medication costs.

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Frequently asked questions about Horizant

The way Horizant works to help with restless leg syndrome (RLS) isn't known. But there are several studies showing that Horizant works well to treat moderate-to-severe symptoms of RLS, such as sensory and motor symptoms, trouble sleeping, daytime sleepiness, and impact on daily activities. It's one of the first-choice options recommended by treatment guidelines for RLS.

It's not completely clear how long it takes Horizant to work for you because everyone can have different experiences with treatment. But a clinical study showed that people with restless leg syndrome who took Horizant started to see improvement in their symptoms, the effect on their sleep, and the impact on daily activities within 2 weeks. Another clinical study found that people with shingles-related nerve pain who took the medication felt improvement within a week of treatment. Keep in mind that it can take about a month or two to get the maximum benefit from the medication. Talk to your prescriber if you're concerned with how well Horizant is working for you.

Horizant is an extended-release form of gabapentin (Neurontin). In fact, Horizant is a prodrug of gabapentin, which means that it turns into gabapentin after it gets absorbed into the body. Horizant and gabapentin are both approved for nerve pain from shingles, but they're also approved for different additional medical conditions. Horizant is also approved for restless leg syndrome, whereas gabapentin (Neurontin) is also approved for a certain type of seizure. In addition, Horizant is taken once or twice per day but gabapentin (Neurontin) is taken up to three times per day. Talk to a healthcare professional to learn more.

It's possible for you to gain weight while you're taking Horizant. Overall, it's not a common side effect, but weight gain might be more likely to happen at higher doses. In clinical studies, just up to 5% of people who took Horizant reported weight gain. Keep in mind that some people also had a larger appetite during treatment, and that could contribute to weight gain. It's not clear how much weight these people gained during treatment, though. Discuss with your care team about planning balanced and nutritious meals that include with lean proteins, whole grains, fruits, and vegetables. They can also work with you to build an exercise routine that's best for you to help manage your weight. Talk with your prescriber if you have more questions about Horizant and weight gain.

It's possible for Horizant to keep you awake. But it's generally more common for the medication to make you sleepy. In clinical studies for shingles-related nerve pain, up to 30% of people who took Horizant reported sleepiness whereas up to 7% of people who took the medication reported having trouble sleeping at night. Pay attention to how this medication affects your sleep and let your prescriber know of any changes in your sleep patterns. Your prescriber can recommend tips if it's making you too sleepy throughout the day or keeping you up at night. They might also recommend you to take a lower dose of Horizant.

No, don't take Horizant with any other form of gabapentin, such as immediate-release gabapentin (Neurontin) or Gralise (gabapentin). Horizant is a prodrug of gabapentin. This means that once Horizant gets absorbed into your body, it gets broken down to gabapentin. So taking Horizant together with other forms of gabapentin can cause you to have too much gabapentin in your body. This can put you at risk for serious side effects like sleepiness, dizziness, and suicidal thoughts and behaviors.

It takes about a day for most of Horizant to leave your body after you take a single dose. This time frame is estimated based on the half-life of gabapentin. The medication can stay in the body for a longer period of time if you have kidney problems. This is because the kidneys help get rid of the medication from your system. Talk with your healthcare team if you have any specific concerns about how long Horizant stays in your body.

The federal government doesn't classify Horizant and gabapentin as controlled substances. But Horizant and gabapentin can be potentially misused because the medications can cause a "high" when they're not taken properly and when they're taken at higher doses. Some states might classify Horizant and gabapentin as controlled substances or have strict dispensing regulations for these medications. Keep in mind that state laws can change. So, it's best to speak with your prescriber or pharmacist about whether Horizant is a controlled substance in your state and how to take the medication safely.