QT prolongation measures delayed ventricular repolarization on ECG. Drugs inhibit rapid delayed rectifier potassium current protein. Normal QTc values increase from 400ms in infancy to 480ms after puberty
Corticosteroids are widely used for inflammatory and autoimmune disorders. They have both glucocorticoid and mineralocorticoid properties. Prednisone is most widely used, followed by dexamethasone
Levothyroxine (Euthyrox) is the active ingredient in the medication. Thyroid hormones should not be used for weight loss. Higher doses may cause serious toxicity, especially with sympathomimetic amines
Black toenail appears due to blood collecting under the nail. Common causes include trauma, fungal infections, and vitamin deficiencies. Runner's toe occurs from repetitive pressure during exercise. Some medications can cause nail discoloration
Mood swings can be normal response to stress or hormonal shifts. Extreme mood swings may indicate mental health disorder. Rapid mood changes can interfere with daily life and relationships
Normal bowel movement frequency is 3 solid or 3 watery stools daily. Less than 3 weekly hard stools may indicate constipation