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Obesity and Pregnancy

Obesity: Should I Have Weight-Loss Surgery?

Obesity: Should I Take Weight-Loss Medicine?

Obesity: Should I Use a Diet Plan to Lose Weight?

obeticholic acid

Object in the Eye: First Aid

Object in the Vagina

Object Stuck in a Child's Airway

Object Stuck in the Throat

Objects in the Ear

Objects in the Eye

Objects in the Nose

Obsessive-Compulsive Disorder (OCD)

Obsessive-Compulsive Disorder: Should I Take Medicine for OCD?

Obstetric Panel

Obstructive Sleep Apnea, Deciding About Surgery

Occupational Asthma

Occupational Therapy

OCD (Obsessive Compulsive Disorder), Deciding About Medicines

ocriplasmin ophthalmic

octreotide (oral/injection)

ocular lubricant

Office Ergonomics

ofloxacin ophthalmic

ofloxacin (oral)

ohm Allergy Relief

olanzapine (injection)

olanzapine (oral)

Olecranon Bursitis (Popeye Elbow)

olodaterol and tiotropium

olodaterol (inhalation)

olopatadine (nasal)

olopatadine ophthalmic

omadacycline (oral/injection)

Omalizumab for Asthma

Omega-3 Fatty Acids for Bipolar Disorder

omega-3 polyunsaturated fatty acids

Omeprazole + SyrSpend SF Alka

omeprazole and sodium bicarbonate

Omnicef Omni-Pac

Omnii Gel Just For Kids

Omniscan Prefill Plus

onabotulinumtoxinA (Botox)

onasemnogene abeparvovec (Zolgensma)

ondansetron (injection)

ondansetron (oral)

Oopherectomy with Hysterectomy, Deciding About

Oophorectomy to prevent ovarian cancer, deciding about

Opcicon One-Step

Open Carpal Tunnel Surgery for Carpal Tunnel Syndrome

Open Gallbladder Surgery for Gallstones

Open Inguinal Hernia Repair (Herniorrhaphy, Hernioplasty)

Open Prostatectomy for Benign Prostatic Hyperplasia

Open Repair Surgery for Abdominal Aortic Aneurysm

Open Surgery for Kidney Stones

Open-Joint Arthroplasty for Temporomandibular Disorders

ophthalmic irrigation (intraocular)

Opioid Use Disorder

Opium Deodorized

opium preparation

Opportunistic Infections in HIV

OptiFlex Complete

Opti-Free Rewetting Drops

Optimum Charcoal

Optimum Magnesium Gluconate

Oral B Anti-Cavity

Oral Breathing Devices for Snoring

Oral Cavity, Pharyngeal, and Laryngeal Cancer Prevention (PDQ®): Prevention - Health Professional Information [NCI]

Oral Cavity, Pharyngeal, and Laryngeal Cancer Prevention (PDQ®): Prevention - Patient Information [NCI]

Oral Cavity, Pharyngeal, and Laryngeal Cancer Screening (PDQ®): Screening - Health Professional Information [NCI]

Oral Cavity, Pharyngeal, and Laryngeal Cancer Screening (PDQ®): Screening - Patient Information [NCI]

Oral Complications of Chemotherapy and Head/Neck Radiation (PDQ®): Supportive care - Health Professional Information [NCI]

Oral Complications of Chemotherapy and Head/Neck Radiation (PDQ®): Supportive care - Patient Information [NCI]

Oral Glucose Tolerance Test

Oral Rehydration Solutions for Children

Orchiectomy for Prostate Cancer

Orchiectomy for Testicular Cancer

Orchiopexy for Undescended Testicle

Organ Transplant

Organ Transplants: Antirejection Medicines

Organizing Your Medical Records

Ornex Maximum Strength

Oropharyngeal Cancer Treatment (Adult) (PDQ®): Treatment - Health Professional Information [NCI]

Oropharyngeal Cancer Treatment (Adult) (PDQ®): Treatment - Patient Information [NCI]

Orphengesic Forte

Ortho Tri-Cyclen

Ortho-Novum 7/7/7

Orthopedic Surgery for Cerebral Palsy

Orthotics for Foot Problems

Os-Cal Extra D3

Osgood-Schlatter Disease

Osteo Bi-Flex Advanced

Osteo Bi-Flex Plus MSM

Osteoarthritis: Exercising With Arthritis

Osteoarthritis: Heat and Cold Therapy

Osteochondritis Dissecans of a Joint

Osteopathic Medicine

Osteoporosis in Men

Osteoporosis Risk Factors

Osteoporosis Risk in Younger Women

Osteoporosis Screening

Osteoporosis: Should I Have a Dual-Energy X-Ray Absorptiometry (DXA) Test?

Osteoporosis: Should I Take Bisphosphonate Medicines?

Osteosarcoma and Malignant Fibrous Histiocytoma of Bone Treatment (PDQ®): Treatment - Health Professional Information [NCI]

Osteosarcoma and Malignant Fibrous Histiocytoma of Bone Treatment (PDQ®): Treatment - Patient Information [NCI]

Osteotomy and Paget's Disease

Osteotomy for Osteoarthritis

Other Health Problems Caused by Herpes Simplex Virus

Other Home Treatment Measures for a First-Degree Burn or Sunburn

Other Treatment: Questions to Ask the Doctor

Other Types of Counseling for PTSD

Outgro Pain Relief

Outpatient Services

Ovarian Cancer: Should I Have My Ovaries Removed to Prevent Ovarian Cancer?

Ovarian Epithelial, Fallopian Tube, and Primary Peritoneal Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI]

Ovarian Epithelial, Fallopian Tube, and Primary Peritoneal Cancer Treatment (PDQ®): Treatment - Patient Information [NCI]

Ovarian, Fallopian Tube, and Primary Peritoneal Cancer Prevention (PDQ®): Prevention - Health Professional Information [NCI]

Ovarian, Fallopian Tube, and Primary Peritoneal Cancer Prevention (PDQ®): Prevention - Patient Information [NCI]

Ovarian, Fallopian Tube, and Primary Peritoneal Cancer Screening (PDQ®): Screening - Health Professional Information [NCI]

Ovarian, Fallopian Tube, and Primary Peritoneal Cancer Screening (PDQ®): Screening - Patient Information [NCI]

Ovarian Germ Cell Tumors Treatment (PDQ®): Treatment - Health Professional Information [NCI]

Ovarian Germ Cell Tumors Treatment (PDQ®): Treatment - Patient Information [NCI]

Ovarian Low Malignant Potential Tumors Treatment (PDQ®): Treatment - Health Professional Information [NCI]

Ovarian Low Malignant Potential Tumors Treatment (PDQ®): Treatment - Patient Information [NCI]

Overactive Bladder

Overcoming Frustration and Anger

Overfeeding a Baby

Overflow Incontinence

Overnight Dexamethasone Suppression Test

Over-the-Counter Medicine Precautions

Over-the-Counter Medicines for Allergies

Overuse Injuries

oxacillin (injection)

Oxacillin Sodium ADD-Vantage

oxiconazole topical

Oxsoralen-Ultra

oxybutynin (oral)

oxybutynin (transdermal)

Oxygen Therapy: Using Oxygen at Home

Oxygen Treatment for Chronic Obstructive Pulmonary Disease (COPD)

oxymetazoline nasal

oxymetazoline ophthalmic

oxymetazoline topical

Ozempic (0.25 mg or 0.5 mg dose)

Ozempic (1 mg dose)

ozenoxacin topical