Magnesium Chloride Doesn't Have to Break the Bank

Magnesium Chloride is one of the more affordable medications on the market — but costs can still add up, especially if you take it daily and pay out of pocket. Whether you're buying the brand-name Slow-Mag or a generic version, there are smart ways to stretch your dollar further.

In this guide, we'll break down the true cost of Magnesium Chloride in 2026, show you where to find the best prices, and share every savings option available to help you pay less.

How Much Does Magnesium Chloride Cost Without Insurance?

Since most oral Magnesium Chloride products are available over the counter, the majority of patients pay cash. Here's what you can expect:

Brand-Name Products

• Slow-Mag (delayed-release tablets, 60 count): $15 to $25
• Mag-64 (tablets, 60 count): $10 to $18

Generic Products

• Generic Magnesium Chloride delayed-release tablets (60 count): $8 to $15
• Generic Magnesium Chloride capsules (60-90 count): $8 to $14
• Magnesium Chloride liquid supplement (16 oz): $10 to $20

Injectable (Clinical Use)

• Magnesium Chloride injection 200 mg/mL (single vial): $3 to $15
• Usually covered under medical benefits when administered in a hospital or clinic

For a daily supplement habit, you're looking at roughly $8 to $25 per month depending on the product and where you shop. That's quite affordable compared to many prescription medications, but over a year it adds up to $96 to $300.

Coupons and Discount Cards

While Magnesium Chloride is already inexpensive, you can save even more with these tools:

Pharmacy Discount Cards

Even though Magnesium Chloride is OTC, some discount card platforms track supplement pricing and can help you compare:

• GoodRx — Compare prices across pharmacies. While primarily for prescription drugs, GoodRx sometimes lists supplement pricing. Check goodrx.com.
• SingleCare — Similar to GoodRx, may offer pricing comparisons. Visit singlecare.com.

Retailer Coupons and Sales

The best savings on OTC Magnesium Chloride often come from retailer promotions:

• Walmart: Consistently among the lowest prices at $8-$12 for generic Magnesium Chloride tablets. Check their $4 prescription list for related products.
• Costco: Members often find bulk supplement pricing 20-40% below retail. A 120-count bottle may run $12-$18.
• Amazon Subscribe & Save: Save an additional 5-15% by setting up automatic deliveries. A 60-count bottle of Slow-Mag can drop to $13-$20.
• Target Circle: Periodic coupons for vitamins and supplements, including magnesium products.
• CVS ExtraCare and Walgreens myWalgreens: Earn rewards points on supplement purchases that translate to future savings.

Manufacturer Coupons

Slow-Mag occasionally offers printable coupons or digital offers through their website and coupon aggregator sites like coupons.com. Savings are typically $1 to $3 per purchase — modest but worth checking before you buy.

Patient Assistance Programs

Because Magnesium Chloride is an inexpensive OTC supplement, there are no dedicated manufacturer patient assistance programs (PAPs) for it like there are for expensive brand-name drugs. However, patients with financial hardship have several options:

General Assistance Resources

• NeedyMeds (needymeds.org) — A comprehensive database of patient assistance programs, discount cards, and free/low-cost clinics. While there's no specific Magnesium Chloride program, NeedyMeds can help you find general supplement assistance.
• RxAssist (rxassist.org) — Another database of patient assistance programs and state-level pharmaceutical assistance.

FSA and HSA Accounts

If you have a Flexible Spending Account (FSA) or Health Savings Account (HSA), you may be able to use pre-tax dollars to pay for Magnesium Chloride. The key requirements:

• You typically need a Letter of Medical Necessity (LOMN) from your doctor stating that the supplement is medically necessary for a diagnosed condition (like hypomagnesemia)
• Keep your receipt and the LOMN on file for tax purposes
• This effectively saves you 20-35% on the cost (your marginal tax rate)

Community Health Resources

Some community health centers, free clinics, and charitable organizations maintain supplement programs for patients who can't afford essential vitamins and minerals. Contact your local health department or 211 information line to ask about available resources in your area.

Other Ways to Save on Magnesium Chloride

Buy Generic

This is the simplest way to save. Generic Magnesium Chloride delayed-release tablets cost $8 to $15 compared to $15 to $25 for brand-name Slow-Mag — a savings of up to $10 per bottle or $120 per year.

Buy in Bulk

Larger bottles (90-120 count) typically offer a lower per-tablet cost. A 120-count bottle of generic Magnesium Chloride might cost $14-$22, compared to $8-$15 for 60 tablets — saving you roughly 10-20% per tablet.

Compare Prices Across Pharmacies

Supplement pricing varies significantly between retailers. Take 5 minutes to compare prices at:

• Walmart (often cheapest)
• Costco (great for bulk)
• Amazon (good with Subscribe & Save)
• Your local independent pharmacy
• Dollar stores (some carry magnesium supplements for $1-$5)

Consider Therapeutic Alternatives

If you're open to different magnesium forms, Magnesium Oxide is the cheapest option at $5 to $12 per bottle. It has lower bioavailability than Magnesium Chloride, but the price difference can be significant over time. Discuss with your doctor whether this trade-off makes sense for your situation.

For a comparison of alternatives, see our guide: Alternatives to Magnesium Chloride.

Use Medfinder to Find the Best Deals

Medfinder can help you locate Magnesium Chloride at pharmacies near you — and finding it in stock at a conveniently located pharmacy saves you time and gas money, which counts as savings too.

Final Thoughts

Magnesium Chloride is already one of the most affordable supplements on the market, but why pay more than you need to? By buying generic, shopping smart, using discount programs, and leveraging FSA/HSA accounts, you can reduce your annual magnesium costs significantly.

If you're having trouble finding Magnesium Chloride in the first place, check out our guide: How to find Magnesium Chloride in stock near you. And for a full overview of the medication, visit: What is Magnesium Chloride?