Similasan eye drops are over-the-counter ophthalmic drops designed to relieve dry, irritated, and allergy-affected eyes using naturally inspired ingredients. The Swiss brand has operated since 1980 and its products now appear in more than 20,000 US retail locations across North America.
The drops come in nine formulas targeting dry eyes, allergies, irritation, and pink eye symptoms. The newer Dry Eye Relief formula uses glycerin 0.25%, an FDA-recognized lubricant, while the allergy and irritated eye formulas remain homeopathic. Customer ratings average 4.6 out of 5 stars from over 2,823 reviewers, with 98% recommending the product.
This review covers how Similasan works, what the active ingredients are in each formula, how it compares to Visine and Systane, what real users report about side effects and effectiveness, and whether the $7.69 to $15 (USD) price point is worth it for most buyers seeking natural eye relief.
What Are Similasan Eye Drops?
Similasan eye drops are over-the-counter ophthalmic drops designed to relieve dry, irritated, and allergy-affected eyes using naturally inspired and homeopathic ingredients. Here’s the thing: this isn’t your average drugstore drop. The brand targets buyers who want gentler, preservative-free alternatives to conventional eye drops.
The brand offers multiple formulas including Dry Eye Relief, Allergy Eye Relief, Irritated Eye Relief, Pink Eye Relief, and Complete Eye Relief. Each formula targets a specific eye concern with distinct active ingredients.
Similasan remedies are found in more than 20,000 retail locations in the US. The brand has operated for over 45 years and built a loyal customer base across North America and Europe. That’s not an accident.
What Types of Similasan Eye Drops Are Available?
Similasan eye drops come in nine formulas including Dry Eye Relief, Allergy Eye Relief, Irritated Eye Relief, Pink Eye Relief, Complete Eye Relief, Computer Eye Relief, Aging Eye Relief, Stye Eye Relief, and Kids Allergy Eye Relief. Each formula uses a distinct set of active ingredients.
The Dry Eye Relief formula comes in a multi-use bottle with an anti-contamination filter and as single-use sterile droppers in a 20-pack. Both formats are preservative-free.
The newer Dry Eye Relief formula uses glycerin 0.25%, an FDA-recognized lubricant, replacing the older homeopathic formulation. The change has divided the brand’s longtime customer base. Some prefer the new formula. Others want the original back.
How Do Similasan Eye Drops Work?
Similasan Dry Eye Relief works by delivering glycerin 0.25%, an eye lubricant that hydrates and protects the eye’s surface by supporting the natural tear film. The formula restores surface moisture without vasoconstrictors or preservatives.
The hyaluronic acid version calms the ocular surface and maintains long-lasting ocular hydration and health. Here’s why that matters: hyaluronic acid binds water to the eye’s surface, extending the duration of moisture between applications. So you’re not just adding a drop. You’re locking in moisture.
Older homeopathic formulas use highly diluted active ingredients according to homeopathic principles to support the body’s natural ability to find relief. These formulas follow a different regulatory framework than the newer OTC drug version.
What Active Ingredients Are in Similasan Eye Drops?
Similasan Dry Eye Relief (new formula) uses glycerin 0.25% as its active ingredient, an FDA-recognized eye lubricant that relieves dryness and soothes irritated eyes by retaining moisture on the ocular surface. Inactive ingredients include phosphate buffer and purified water.
Similasan Irritated Eye Relief (homeopathic) uses Belladonna 6X for dryness, redness, burning, and grittiness; Euphrasia 6X for watery discharge; and Hepar sulphuris 12X for redness and stinging. These are diluted to extremely low concentrations per homeopathic practice.
Active Ingredients by Formula:
| Formula | Active Ingredient(s) | Purpose |
| Dry Eye Relief (new) | Glycerin 0.25% | Lubrication, moisture retention |
| Irritated Eye Relief | Belladonna 6X, Euphrasia 6X, Hepar sulphuris 12X | Redness, burning, discharge |
| Allergy Eye Relief | Apis mellifica, Galphimia glauca, Sabadilla | Itching, watery eyes, stinging |
| Dry Eye Relief (old homeopathic) | Belladonna 6X, Euphrasia 6X, Mercurius sublimatus 6X | Dryness, redness, inflammation |
Similasan Dry Eye Relief (original homeopathic formula) used Belladonna 6X, Euphrasia 6X, and Mercurius sublimatus 6X to address dryness, redness, and inflammation. The 6X dilution means the active substance is present at 1 part per 1,000,000.
Are Similasan Eye Drops Homeopathic?
No. Not all Similasan formulas are homeopathic. Some formulas remain homeopathic (Irritated Eye Relief, Allergy Eye Relief), while newer formulas like the updated Dry Eye Relief use FDA-recognized active ingredients and are classified as OTC drugs.
The FDA states: ‘This homeopathic product has not been evaluated by the Food and Drug Administration for safety or efficacy’ and is ‘not aware of scientific evidence to support homeopathy as effective.’ That disclaimer applies to the homeopathic formulas only. The new glycerin version plays by different rules.
Similasan states that active ingredients in homeopathic formulas are ‘non-toxic and have no known side effects.’ The company maintains that homeopathic principles support the body’s natural healing response, though this claim lacks clinical validation.
What Are the Benefits of Similasan Eye Drops?
Similasan eye drops provide temporary relief of burning, irritation, and discomfort due to eye dryness, while soothing, moisturizing, and protecting against further irritation. The preservative-free formulas are designed for frequent, daily use without the risks associated with preservative accumulation.
The preservative-free formula uses an anti-contamination filter and air-tight dispenser. This design makes the drops suitable for eyes sensitive to preservatives found in most conventional drops. Preservative sensitivity is common among contact lens wearers and chronic dry eye sufferers.
Key Benefits:
- Temporary relief of dry, burning, irritated eyes
- Preservative-free formula suitable for sensitive eyes
- Hyaluronic acid for instant and long-lasting hydration
- No vasoconstrictors that can worsen symptoms over time
- Safe for adults and children age 2 and over
The hyaluronic acid formula provides instant lubrication, long-lasting comfort, and eye health support for screen-time fatigue, air conditioning, and wind exposure. These are among the most common triggers for daily eye discomfort. And Similasan addresses all of them in one formula.
Do Similasan Eye Drops Relieve Dry Eyes?
Yes. Similasan Dry Eye Relief delivers clinically meaningful moisture relief, with users rating the drops 4.4 to 5 out of 5 in independent testing and describing the formula as ‘the most gentle and moisturizing drop’ available. The glycerin base supports sustained ocular surface hydration.
Users can apply 1-2 drops as needed throughout the day or night, though the product should not be used more than 30 days after opening. The single-use dropper format eliminates contamination risk for those using drops multiple times daily.
Here’s the part most people miss: some longtime users report the newer non-homeopathic formula is less effective than the original. One reviewer called it ‘neither soothing nor moisturising’ compared to the old homeopathic version. So if you’re new to Similasan, the current formula may work well. If you’re a longtime fan, it’s worth knowing the formula has changed.
Do Similasan Eye Drops Help With Allergy Symptoms?
Yes. Similasan Allergy Eye Relief earns 4.5 out of 5 stars from 1,706 ratings, with 98% of reviewers recommending the product for allergy eye symptom relief including redness, itching, watery eyes, and burning.
The formula uses Apis mellifica for burning, itching, and stinging; Galphimia glauca for watery eyes and respiratory allergy symptoms; and Sabadilla for watery, burning, and itching eyes. In fact, these homeopathic ingredients work together to address multiple allergy symptoms simultaneously.
Multiple users report using Similasan Allergy Eye Relief for years as their only go-to product. One stated: ‘These are the best natural eye drops I can find.’ The consistent repeat-purchase behavior suggests genuine satisfaction among allergy sufferers.
What Do Similasan Eye Drops Reviews Say?
Similasan eye drops carry a 4.6 out of 5 stars rating from 2,823 reviewers on major retail platforms, with 98% recommending the product and 100% rating it as good quality. The high satisfaction rate is consistent across multiple retail sites.
Reviewers consistently highlight gentle soothing relief, natural ingredients, long-term effectiveness, and suitability for daily use without stinging. The brand’s loyal following spans decades, with many users purchasing continuously for 10-20 years.
Common complaints include the dropper design being difficult to use, the new formula underperforming versus the old homeopathic version, and limited in-store availability. These complaints cluster around packaging and formula changes rather than the core product concept. Bottom line: most complaints are about the bottle, not the formula.
What Do Customers Love About Similasan Eye Drops?
Similasan loyal customers praise decades of consistent quality, with one reviewer stating ‘I have been using Similasan products for over 20 years and the quality and effects are like no other.’ Long-term use patterns indicate the drops deliver reliable results.
Reviewers praise the drops for being gentle, non-stinging, and soothing. One states: ‘This product soothes my eyes under any circumstance when my eyes are irritated.’ The absence of burning on application is a key factor for allergy and dry eye sufferers. For those who’ve tried drops that burn? That’s everything.
Users specifically mention natural or homeopathic ingredients as their reason for choosing Similasan over commercial alternatives. Multiple reviewers state they ‘wanted more natural ingredients’ and found Similasan to be the best option in this category.
What Are the Common Complaints About Similasan Eye Drops?
The most frequent Similasan complaint targets the flat-top bottle design, which reviewers say makes it difficult to guide drops into the eye without the bottle touching the eyelashes, a problem that is dangerous and unhygienic. The old tapered nozzle design was easier and safer to use.
Former homeopathic formula fans report the new glycerin-based Dry Eye Relief is ‘neither soothing nor moisturising’ compared to the old glass bottle version. The formula change has created a segment of disappointed customers who seek the original product on secondary markets like eBay.
Pros:
- Gentle, non-stinging formula suitable for daily use
- Natural and homeopathic ingredients appeal to health-conscious buyers
- Preservative-free with anti-contamination filter
- Loyal customer base after 20+ years of use
Cons:
- Flat-top bottle design difficult to aim accurately
- New glycerin formula less effective than original homeopathic version for some users
- Limited in-store availability in many areas
Multiple reviewers note Similasan is hard to find in local stores. The brand was previously pulled from some retail shelves due to FDA regulatory actions on homeopathic products, leading users to order online or stock up in bulk when supply is available.
How Do Similasan Eye Drops Compare to Competitors?
Similasan’s primary differentiator is its naturally inspired and homeopathic ingredients versus the synthetic preservatives and vasoconstrictors found in most conventional drops. This positions it as a distinct choice for buyers who want to avoid chemical additives.
One reviewer states Similasan ‘is better than RX drops for my eyes,’ suggesting some users experience superior relief versus prescription alternatives. And here’s the kicker: prescription eye drops can run $40 to $100+ per bottle (USD). Similasan sits at $7.69 to $15.
One longtime Similasan user who switched away after availability issues reports the commercial alternative ‘not only didn’t help the dry eyes but actually irritated them.’ The switching experience reinforced the preference and brought them back to Similasan. That says a lot.
Similasan vs Visine: Which Is Better?
Similasan and Visine use fundamentally different formulas. Visine relies on tetrahydrozoline, a vasoconstrictor that reduces redness by constricting blood vessels, while Similasan uses naturally derived or homeopathic ingredients without any vasoconstrictors.
Similasan vs Visine Comparison:
| Feature | Similasan | Visine |
| Active ingredient type | Natural/homeopathic | Synthetic vasoconstrictor |
| Preservative-free | Yes | Most formulas contain BAK |
| Vasoconstrictor | None | Tetrahydrozoline |
| Suitable for frequent use | Yes | Risk of rebound redness |
| Price range | $7.69 – $15 USD | $5 – $12 USD |
Similasan is preservative-free, while most Visine formulas contain benzalkonium chloride (BAK), a preservative that can worsen dry eye symptoms with frequent use. For chronic dry eye sufferers or frequent users, the absence of BAK in Similasan is a meaningful safety advantage.
Similasan vs Systane: How Do They Compare?
Systane uses polyethylene glycol 400 and propylene glycol as lubricating agents, while Similasan Dry Eye Relief uses glycerin 0.25% and hyaluronic acid for moisture retention. The formula serves as a naturally derived alternative to Systane’s synthetic lubricant approach.
Similasan Dry Eye Relief is priced around $7.69 to $15 per bottle (USD), comparable to Systane Ultra at $8 to $18. Systane has wider in-store availability, which is a practical advantage for buyers who prefer local retail shopping over online ordering.
Are Similasan Eye Drops Safe?
Similasan eye drops are generally safe for most users. The homeopathic formulas use ingredients the company describes as ‘non-toxic and having no known side effects.’ The newer glycerin-based formula uses an FDA-recognized OTC lubricant ingredient.
The single-use sterile droppers are approved for adults and children age 2 and over. This broad age range makes Similasan suitable for family use without age-specific formulas for most applications.
Contact lens wearers are advised to consult an eye care professional before using Similasan eye drops. Lens wearers face unique considerations regarding drop composition and potential interaction with lens materials.
Do Similasan Eye Drops Have Side Effects?
In rare cases, Similasan eye drops trigger hypersensitivity reactions including redness, burning, swelling, or itching. Users who experience these reactions should discontinue use immediately and consult a healthcare professional if symptoms persist.
Here’s the thing: although ingredients like Belladonna and Mercurius sublimatus sound alarming, they are diluted to 6X or 12X potency. At 6X dilution, the original substance is present at 1 part per 1,000,000 (0.000001%), far below any toxicological threshold for harm. In plain English: the scary-sounding names are not a safety concern at these dilution levels.
Who Should Avoid Similasan Eye Drops?
Users with hypersensitivity to any ingredient should avoid Similasan eye drops. Those with severe eye conditions such as glaucoma, eye infections, or post-surgical eyes should consult a doctor before use, as drops may not be appropriate for all clinical situations.
Stop Use and Ask a Doctor If:
- Redness, burning, swelling, or itching worsens after application
- Eye pain increases or symptoms last more than 72 hours
- Vision changes occur after use
- Eye condition shows no improvement within 3 days
Pregnant or breastfeeding users should consult a healthcare professional before using Similasan eye drops. The product labeling states: ‘If pregnant or breast feeding, ask a health professional before use,’ indicating caution is warranted.
Are Similasan Eye Drops FDA Approved?
The new Similasan Dry Eye Relief (glycerin formula) is an FDA-recognized OTC drug product using a monograph-compliant active ingredient. The homeopathic formulas carry FDA disclaimers stating they have not been evaluated for safety or efficacy.
The FDA states it is ‘not aware of scientific evidence to support homeopathy as effective’ for the homeopathic Similasan products. This is a standard disclaimer for homeopathic OTC products. It does not constitute a safety recall or ban.
Despite FDA caveats on homeopathic formulas, Similasan has operated for 45+ years with products in 20,000+ US retail locations. The brand’s longevity and retail presence reflect sustained consumer trust despite the regulatory distinction. That’s not nothing.
How Much Do Similasan Eye Drops Cost?
Similasan eye drops range from approximately $7.69 (USD) for a 0.33 fl oz (9.8 ml) bottle at major retailers to $15 for larger or specialty formats. Multi-packs and single-use dropper sets offer better per-application value for frequent users.
Similasan Pricing by Format:
| Format | Size | Approx. Price (USD) |
| Multi-use bottle | 0.33 fl oz (9.8 ml) | $7.69 – $10 |
| Single-use droppers (20-pack) | 20 x 0.4 ml | $12 – $15 |
| Multi-pack (6 bottles) | 6 x 0.33 fl oz | $35 – $45 |
97% of customers rate Similasan as good value. The high value rating suggests most buyers feel the price is justified by the quality of relief and the natural ingredient profile compared to conventional alternatives at similar price points.
Are Similasan Eye Drops Worth the Price?
Yes. For long-term users, Similasan delivers sustained, gentle relief that keeps buyers returning for years. Multiple customers buy multi-packs to reduce per-unit cost, reinforcing the perception that the product justifies its price point.
One reviewer states Similasan ‘is better than RX drops for my eyes.’ Prescription eye drops can cost $40 to $100+ per bottle (USD) without insurance, making Similasan’s $7.69 to $15 price range an attractive value proposition for buyers who achieve comparable relief from the OTC formula. So what does that mean for you? It means Similasan may cost less than a co-pay.
Where Can You Buy Similasan Eye Drops?
Similasan eye drops are available at Walmart, CVS, Amazon, the official SimilasanUSA.com website, and more than 20,000 US retail locations nationwide. International buyers can also order from amazon.co.uk and similasan.co.uk.
Where to Buy Similasan:
- Walmart (in-store and online)
- CVS Pharmacy (in-store and online)
- Amazon.com
- SimilasanUSA.com (official website)
- eBay (for legacy homeopathic formulas)
Multiple reviewers note that Similasan can be difficult to find in local stores and recommend buying online or stocking up when available. The brand recommends its official website and major pharmacy chains for the most consistent supply and product freshness.
Are Similasan Eye Drops Worth It?
Similasan eye drops earn a 4.6 out of 5 stars rating from thousands of buyers, with 98% recommending them for gentle, naturally inspired relief of dry, irritated, and allergy-affected eyes. The brand’s 45-year track record supports its reputation for quality.
Similasan is best suited for buyers who want preservative-free, naturally inspired eye relief without the vasoconstrictors found in conventional redness-reducing drops. Users with sensitive eyes, frequent irritation from screen time, air conditioning, or seasonal allergies represent the ideal customer profile.
Buyers seeking the original homeopathic formula may find the newer glycerin-based product disappointing. Those who prefer easy-dispenser bottles may also struggle with the current packaging design. Knowing these limitations helps set accurate expectations before purchase. But for most buyers? The good news is that the core formula still works.
Who Should Buy Similasan Eye Drops?
Similasan eye drops are the right choice for buyers who want a preservative-free, naturally inspired formula without synthetic vasoconstrictors. The ideal user has sensitive eyes, dry eye symptoms from screen time, or seasonal allergies and wants a daily drop that does not sting.
Buyers who prefer wide in-store availability or the lowest possible price may find conventional alternatives like Systane or Visine more convenient. Similasan’s value is in its formula philosophy, not its pharmacy shelf placement.