Blood Thinners
Patients using blood thinners are at an increased risk when using this medicine. In these patients, blood clotting time is increased. The dose adjustment of blood thinners is required.
Prolonged Therapy
Patients at prolonged therapy with Omacillin are at an increased risk. These patients may develop changes in blood count and increase in liver enzymes. In such patients, monitoring of blood cells production, kidney and liver function is required.
Lyme Disease
Patients with a bacterial infection caused by a tick bite (Lyme disease) are at an increased risk when using this medicine. These patients may suffer from allergic reactions called Jarisch-Herxheimer reaction.
Skin Reactions
Patients using Omacillin are at an increased risk of developing serious skin reactions. If this happens, stop using this medicine.
Kidney Dysfunction
Patients with kidney dysfunction are at an increased risk when using this medicine. In such patients, the dose should be adjusted according to the condition.
History of Brain and Spinal Cord Disorders
Patients using Omacillin in high doses and have a history of
seizures,
epilepsy, or brain and spinal cord disorders are at an increased risk. These patients may suffer from seizures.
Birth Defect Called Phenylketonuria
Patients with increased phenylalanine levels in the body are at an increased risk when using chewable tablets of Omacillin. The chewable tablets should not be used in these patients if it contains phenylalanine. The oral suspension of Omacillin can be used in these patients because it does not contain phenylalanine.
Viral Infection
Patients with viral infection (also called
mononucleosis) caused by Epstein-Barr virus are at increased risk when using this medicine. These patients may suffer from skin rash. It is advised that Omacillin should not be used in these patients.
Development of Drug Resistant Bacteria
Omacillin is not likely to provide benefit unless the patient uses it to treat a bacterial infection. Otherwise, the risk of developing drug-resistant bacteria is increased by the use of Omacillin.
Antibacterial Drugs
Patients using antibacterial drugs including Omacillin are at an increased risk. These patients may suffer from
diarrhea associated with Clostridium difficile bacteria that can lead to severe inflammation of the colon. If this happens, stop using this medicine and take
antibiotics, protein supplements or maintain the
balance of body fluid and electrolyte. If necessary, surgical evaluation should be done.
Cloudy Urine
Patients with reduced urine output and bladder catheters are at an increased risk when using this medicine. These patients may suffer from cloudy urine. It is advised to maintain urinary output and adequate fluid intake to reduce the chances of cloudy urine. In patients with bladder catheters, a regular checkup is recommended.