The purpose of this study is to look at how taking JNJ-54861911 every day will effect the amount of rosuvastatin or metformin in your blood after taking only a single dose of either one.

This is an open-label (all people know the identity of the intervention), single-center, fixed sequence, 2-panel study in a total of 32 healthy adult participants (16 participants per panel). The study consists of 3 phases: a Screening Phase of approximately 3 weeks (Days -22 to -2), an Open-Label Treatment Phase consisting of a single 19 day Treatment Period for Panel 1 (Days -1 to 18) or a single 18 day Treatment Period for Panel 2 (Days -1 to 17) and a Follow-up Phase of 5 to 7 days. In Panel 1, each participant will be administered a single oral dose of 10 milligram (mg) rosuvastatin on Day 1 and Day 14. Participants will receive JNJ-54861911 at a dose of 25 mg once daily from Day 8 until Day 17. In Panel 2, each participant will be administered a single oral dose of 500 mg metformin on Day 1 and Day 14. Participants will receive JNJ-54861911 at a dose of 25 mg once daily from Day 8 until Day 16. Participants' safety will be monitored throughout the study.

Inclusion Criteria:

• Signed an informed consent document indicating they understand the purpose of and procedures required for the study and are willing to participate in the study
• Willing to adhere to the prohibitions and restrictions specified in this protocol
• All woman must have a negative serum pregnancy test at Screening and on Day minus (-) 1 of the Treatment Period
• If a woman must not be of childbearing potential: postmenopausal (greater than [>]45 years of age with amenorrhea for at least 12 months, or any age with amenorrhea for at least 6 months and a serum follicle stimulating hormone {FSH} level >40 International Units /Litre [IU/L]); documented permanently sterilized (example, tubal occlusion, hysterectomy, bilateral salpingectomy); or otherwise be incapable of pregnancy
• If a woman, must agree not to donate eggs (ova, oocytes) for the purposes of assisted reproduction during the study and for 3 months after receiving the last dose of study drug
• Non-smoker

Exclusion Criteria:

• Known allergy to rosuvastatin, metformin, JNJ-54861911 or to heparin or history of heparin induced thrombocytopenia
• History of or current clinically significant medical illness or a clinically significant 12-lead electrocardiogram (ECG) abnormality
• Donated blood or blood products or had substantial loss of blood (more than 500 milliliter [mL]) within 3 months before the first administration of study drug or intention to donate blood or blood products during the study
• Received an experimental drug or used an experimental medical device within 1 month or within a period less than 10 times the drug's half-life, whichever is longer, before the first dose of the study drug is scheduled
• Unable to swallow solid, oral dosage forms whole with the aid of water
• If a man, who plans to father a child while enrolled in the study or for 3 months after receiving the last dose of study drug
• Vulnerable participants
• Participants should not be enrolled if they have exposure to radiologic or magnetic resonance studies involving the use of intravascular contrast materials (for example, computed tomography [CT] scans with intravascular contrast materials), within 48 hours prior to Screening and for duration of study