Yes, Restasis is preservative free. Both versions of the medication, the original single-use vials and the Restasis Multidose bottle, contain no preservatives. This is confirmed on the FDA-approved labeling for each formulation, and the inactive ingredients are identical: glycerin, castor oil, polysorbate 80, carbomer copolymer type A, purified water, and sodium hydroxide to adjust pH. No chemical preservative like benzalkonium chloride appears in either product.
Two Formats, Both Preservative Free
The original Restasis comes in small, single-use plastic vials. Each vial holds enough solution for one application, and because there’s no preservative to prevent bacterial growth after opening, the manufacturer instructs you to throw away the vial immediately after use, even if liquid remains inside. You cannot save a partially used vial for later, and refrigerating it doesn’t change this.
Restasis Multidose, approved by the FDA in October 2016, solves that waste problem with a different approach. The bottle uses a one-way valve and an air filter built into the tip, which physically blocks contaminants from entering the bottle after each use. This mechanical barrier keeps the solution sterile without any chemical preservative, letting you use the same bottle for multiple doses over the course of treatment.
Why Preservative Free Matters for Dry Eye
Restasis is a long-term medication. It’s designed to increase tear production in people whose dry eye is driven by inflammation, and most people use it twice a day, every day, for months or longer. That frequency of use is exactly why preservative-free formulations matter.
Chemical preservatives in eye drops can damage the surface of the eye over time, particularly in people who already have a compromised corneal surface. Patients with severe dry eye are especially vulnerable. Preservative-containing drops have been linked to discomfort on instillation, burning, stinging, a gritty foreign-body sensation, and visible redness of the conjunctiva. Switching to preservative-free formulations significantly reduces these symptoms. For a medication you’re putting in your eyes twice daily for the foreseeable future, avoiding that cumulative irritation is a real practical benefit.
Other Preservative-Free Dry Eye Medications
Restasis isn’t the only prescription dry eye treatment that skips preservatives. Vevye, a newer cyclosporine drop at a higher concentration (0.1%), is both preservative free and water free. Miebo, which treats dry eye caused by oil gland dysfunction in the eyelids, is also preservative and water free. Cequa, another cyclosporine-based drop, uses the same active ingredient as Restasis at a slightly different concentration (0.09%). If you’re comparing options with your eye doctor, the preservative-free status of Restasis is a feature it shares with several of its competitors, not a unique advantage.
Handling Single-Use Vials Correctly
The most common question people have about Restasis vials is whether they can squeeze out a second dose later. The answer is no. Without a preservative, once the foil pouch is opened and the vial tip is twisted off, bacteria from your hands, eyelids, or the air can contaminate the remaining liquid. Using a contaminated drop risks introducing infection to eyes that are already irritated and inflamed. One vial, one use, then discard. If the waste bothers you, the Multidose bottle is the better option since it stays sterile across multiple uses thanks to its valve system.