Health

Metformin contrast dye rules depend on kidney function, acute kidney injury risk and contrast route. Learn when to pause, restart and why guidance differs.

A prednisone taper may not be needed after a short course, but longer use can suppress cortisol. Know symptoms to report and when illness or surgery needs care.

Learn how gradual ascent, rest days and acetazolamide may reduce altitude sickness risk, plus symptoms that mean you should stop climbing or descend.

C diff can cause diarrhoea during or after antibiotics, but symptoms overlap. Learn when testing is considered, why stool must be unformed and urgent warning signs.

Measles incubation period, immunity checks and time-sensitive steps after exposure: when MMR or immunoglobulin may help, and who needs urgent advice.

Levothyroxine and coffee can affect absorption when taken too close together. Learn how long to wait after your dose, when to eat, and whether bedtime dosing works.

A lipoprotein test can reveal inherited heart risk. Learn how to read Lp(a) results, why units don’t convert cleanly, and what prevention can change.

Diphenhydramine sedation can impair driving even when you feel alert. Learn how long effects may last, what labels advise, and why rules vary by region.

Newborn bilirubin levels are interpreted by age in hours, gestational age and risk. Learn why jaundice in the first 24 hours needs urgent review and follow-up.

Rinse mouth after inhaler use to help lower thrush risk. Learn how to spit, use a spacer correctly, recognize symptoms and keep taking your preventer.