I found these green capsules that have sl
406 imprinted on them and I'm afraid that my kids may have taken them. Can you help me find out what they are??

Is it round? I did find a green round pill with the imprint 5406 - that could be HCTZ, which lowers blood pressure. When you find a pill that you do not know, the wise choice is to call either your pharmacy, your ER, or your Doctor and explain what you found. They will tell you what it is and the proper disposal of that drug.

This from the United States national Library of Medicine:

FAQ
Pill Identification
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Question: How can I identify a pill?

Answer:

You should first ask your pharmacist or doctor to identify the pill.

The following Internet resources may also help identify medications sold in the United States. The National Library of Medicine doesn't recommend or endorse the products, services, or information at these Web sites. You need to evaluate the value, authoritativeness, and timeliness of the information you find.

The FDA Division of Drug Information identification service at
Frequently Asked Drug Information Questions


The Drug Digest Pill Images at
Pill Images - Drug Library - DrugDigest


The Identification Web site from the California Department of Justice includes photos of street drugs at Stop Drugs.org - Identification

Pill Identification Wizard at Pill Identifier - Drugs.com

Books for identifying drugs may be available at your local public or university library:
Ident-a-drug reference: for drug, tablet, and capsule identification
Identifies drugs by the numbers and letters on the drugs; does not include photos.

Mosby's Drug Consult
Includes photos

Physicians' Desk Reference (PDR)
Includes photos

Actually it's Indomethacin, an arthritis medication, but as said above, if there is no reason for this to be in your home, go to a pharmacy for safe disposal of the pills.

Complete Indomethacin information from Drugs.com