Health & Body
How Long Does a Cold Last?
7–10 days for most adults. Symptoms peak around days 2–3, then gradually improve. A cough may linger for up to 3 weeks after other symptoms resolve.
How Long Does It Take for THC to Leave Your System?
3–30+ days in urine depending on usage frequency. Single use clears in 3–4 days; daily use can be detectable for 30+ days. Blood tests detect THC for 1–7 days.
How Long Does It Take for Alcohol to Leave Your System?
About 1 hour per standard drink for blood/breath. The body metabolizes alcohol at roughly 0.015 g/dL per hour. Urine tests detect alcohol for 12–24 hours; hair tests up to 90 days.
How Long Does Weed Stay in Your System?
THC is detectable in urine for 3–30 days depending on usage frequency. In blood, 1–2 days for occasional users. In hair, up to 90 days.
How Long Does Alcohol Stay in Your System?
Alcohol is metabolized at about 1 standard drink per hour. It's detectable in blood for up to 12 hours, urine for 12–80 hours (EtG test), breath for 12–24 hours, and hair for up to 90 days.
How Long Does It Take for Nicotine to Leave Your System?
1–3 days for nicotine itself. Its metabolite cotinine remains detectable for 1–10 days in blood and urine. Hair tests can detect nicotine for up to 90 days.
How Long Does It Take to Lose Belly Fat?
6–12 weeks to see noticeable reduction with consistent diet and exercise. Losing 1–2 lbs per week is safe; visible belly fat loss typically starts around weeks 4–6.
How Long Does Sciatica Last?
4–6 weeks for most acute episodes. Chronic sciatica can persist for 3+ months. About 80–90% of cases resolve without surgery within 6 weeks with conservative treatment.
How Long Does a Concussion Last?
2–4 weeks for most people. About 80% of concussions resolve within 2 weeks. Post-concussion syndrome can extend symptoms for months in 10–30% of cases.
How Long Does Adderall Last?
4–6 hours for immediate-release (IR) and 10–12 hours for extended-release (XR). Effects vary by dose, metabolism, and individual body chemistry.
How Long Does a Stomach Bug Last?
1–3 days for norovirus, 3–8 days for rotavirus. Most viral gastroenteritis resolves within 1–3 days in healthy adults. Bacterial cases may last 1–2 weeks.
How Long Does Ibuprofen Last?
4–6 hours of pain relief per dose. Effects begin within 20–30 minutes and peak at 1–2 hours. The half-life of ibuprofen is approximately 2 hours.
How Long Does It Take for Antibiotics to Work?
24–72 hours to feel improvement for most infections. Antibiotics start killing bacteria within hours, but noticeable relief takes 1–3 days. Full course is typically 5–14 days.
How Long Does It Take for Hair to Grow Back?
Hair grows about 6 inches (15 cm) per year on average. After a buzz cut, expect a short style in 3–6 months. After chemotherapy, regrowth begins in 3–6 months with full coverage in 12+ months.
How Long Does Pink Eye Last?
7–14 days for viral pink eye, 5–10 days for bacterial (faster with antibiotic drops).
How Long Does the Flu Last?
5–7 days for most adults. Fever typically breaks within 3–4 days. Cough and fatigue can linger for 2+ weeks. Children and elderly may take longer.
How Long Does a Hangover Last?
12–24 hours for most people. Symptoms typically peak 12–14 hours after blood alcohol concentration returns to zero and resolve within a day. Severe hangovers can linger up to 72 hours.
How Long Does a UTI Last?
3–7 days with antibiotics. Uncomplicated UTIs often improve within 1–2 days of starting treatment.
How Long Does Botox Last?
3–4 months on average. Results begin appearing within 3–5 days and reach full effect at 2 weeks.
How Long Does COVID Last?
5–10 days for most people with mild to moderate symptoms. Severe cases may take 2–6 weeks. Some people develop long COVID with symptoms lasting months.