Cimerli (ranibizumab-eqrn) is a prescription drug used for certain eye conditions. It’s not known to interact with alcohol, other drugs, or supplements. However, you may not be able to receive Cimerli if you have an eye infection.

Cimerli is prescribed to adults to treat:

Cimerli comes as a liquid solution that’s injected into your eye by an eye specialist. Its active ingredient* is ranibizumab-eqrn. (The reason “-eqrn” appears at the end of the drug’s name is to show that it’s distinct from other drugs that are similar.)

An interaction can occur because one substance causes another substance to have a different effect than expected. Interactions can also occur if you have certain health conditions.

Keep reading to learn about Cimerli’s possible interactions. And for more information about Cimerli, including details about its uses, see this article.

* An active ingredient is what makes a drug work.

Cimerli isn’t known to interact with other drugs. The manufacturer of Cimerli didn’t look at interactions in the drug’s studies.

Still, it’s possible that interactions with other medications may be recognized in the future. For example, new drugs may become available that are found to interact with Cimerli.

Before you start receiving Cimerli injections, tell your doctor and pharmacist about any prescription, over-the-counter, or other drugs you take. Sharing this information with them may help prevent possible interactions. (To learn whether Cimerli interacts with herbs or vitamins and supplements, see the “Are there other interactions with Cimerli?” section below.)

If you have questions about drug interactions that may affect you, talk with your doctor or pharmacist.

Certain health conditions or other factors could raise your risk of harm if you receive Cimerli. In such cases, your doctor may not prescribe Cimerli for you. These are known as contraindications. The list below includes contraindications of Cimerli.

If you have an infection in or near your eye: You may not be able to receive Cimerli injections if you have an eye infection. This is because receiving the drug could worsen your infection. Your doctor may delay your Cimerli treatment until after they’ve treated the infection.

If you’ve had an allergic reaction: If you’ve had an allergic reaction to Cimerli or any of its ingredients, your doctor likely won’t prescribe Cimerli for you. This is because receiving the drug could cause another allergic reaction. You can ask your doctor about other treatments that may be better options for you.

Before you start receiving Cimerli injections, talk with your doctor if either of the factors above applies to you. Your doctor can determine whether Cimerli is safe for you to receive.

Cimerli is not known to interact with alcohol.

If you have questions about consuming alcohol during Cimerli treatment, talk with your doctor or pharmacist.

Cimerli isn’t known to interact with supplements, foods, vaccines, or lab tests. But interactions are still possible. Keep reading below for more details.

Does Cimerli interact with supplements?

Before you start receiving Cimerli injections, talk with your doctor and pharmacist about any herbs or vitamins and supplements you take. Sharing this information with them may help you avoid possible interactions.

If you have questions about interactions that may affect you, talk with your doctor or pharmacist.

Cimerli and herbs

There are currently no reports of Cimerli interacting with herbs. But this doesn’t mean that interactions with herbs won’t be recognized in the future.

For this reason, it’s still important to check with your doctor or pharmacist before taking any of these products while receiving Cimerli injections.

Cimerli and vitamins

There are currently no reports of Cimerli interacting with vitamins. But this doesn’t mean that vitamin interactions won’t be recognized in the future.

For this reason, it’s still important to check with your doctor or pharmacist before taking any of these products while receiving Cimerli injections.

Does Cimerli interact with food?

There are currently no reports of Cimerli interacting with food. If you have questions about eating certain foods during treatment with Cimerli, talk with your doctor.

Does Cimerli interact with vaccine or lab tests?

There are currently no reports of Cimerli interacting with vaccines or lab tests. If you have questions about receiving certain vaccines or having lab tests done during Cimerli treatment, talk with your doctor.

Does Cimerli interact with cannabis or CBD?

There are currently no reports of Cimerli interacting with cannabis (commonly called marijuana) or cannabis products such as cannabidiol (CBD). But as with any drug or supplement, talk with your doctor before using cannabis with Cimerli.

Note: Cannabis is illegal at a federal level but is legal in many states to varying degrees.

Certain medical conditions or other health factors may raise the risk of interactions with Cimerli. Before starting Cimerli treatment, talk with your doctor about your health history. They’ll determine whether Cimerli is right for you.

Health conditions or other factors that might interact with Cimerli include:

Eye infection: It may not be safe to receive Cimerli injections while you have an eye infection. This is because receiving the drug could worsen your infection. Your doctor may delay your Cimerli treatment until after they’ve treated the infection.

Pregnancy: It’s not known whether it’s safe to receive Cimerli injections during pregnancy. If you’re pregnant or planning a pregnancy, talk with your doctor.

Breastfeeding: It’s not known whether it’s safe to receive Cimerli while breastfeeding. It isn’t known whether the drug passes into breast milk or causes side effects in a child who’s breastfed. If you’re breastfeeding or planning to do so, talk with your doctor about your options.

Allergic reaction: If you’ve had an allergic reaction to Cimerli or any of its ingredients, your doctor will likely not prescribe Cimerli. This is because receiving injections of the drug could cause another allergic reaction. You can ask your doctor about other treatments that may be better choices for you.

Taking certain steps can help you avoid interactions with Cimerli. Before starting treatment, talk with your doctor and pharmacist. Things to discuss with them include:

  • how you can help prevent eye infections
  • other medications you take, as well as any vitamins, supplements, and herbs (your doctor or pharmacist can help you fill out a medication list)
  • what to do if you start taking a new drug during Cimerli treatment

It’s also important to understand Cimerli’s label and other paperwork that may come with the drug. Colored stickers that describe interactions may be on the label. And the paperwork (sometimes called the patient package insert or medication guide) may have other details about interactions. (If you did not get paperwork with Cimerli, ask your pharmacist to print a copy for you.)

If you have difficulty reading or understanding this information, your doctor or pharmacist can help.

If you still have questions about Cimerli and its possible interactions, talk with your doctor.

Questions you may want to ask your doctor include:

  • Does the length of my Cimerli treatment affect my risk of interactions?
  • What should I do if I suspect an interaction with Cimerli?
  • Should I tell you if I stop or start any medications during my Cimerli treatment?

To get information on different conditions and tips for improving your health, subscribe to any of Healthline’s newsletters. You may also want to check out the online communities at Bezzy. It’s a place where people with certain conditions can find support and connect with others.

Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up to date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or another healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.