how long does ritalin last

Ritalin's duration largely depends on its formulation. Immediate-release Ritalin typically lasts about 3 to 4 hours after ingestion, while extended- release versions like Ritalin LA can last between 8 to 12 hours. The medication generally starts working within 20-30 minutes. The half-life of Ritalin (the time it takes for half the drug to be metabolized and cleared) is approximately 2 to 3.5 hours for immediate-release forms and slightly longer for extended-release versions. Most of the drug is metabolized within 12 to 24 hours, though traces can be detected up to 1 to 3 days in urine tests. Factors affecting duration include dosage, individual metabolism, age, liver function, body weight, and whether it is taken with food. Higher doses and extended- release formulations prolong the effect, while faster metabolism and liver function can shorten it. In summary, if you're taking immediate-release Ritalin, expect effects lasting around 3-4 hours, whereas extended-release forms can provide symptom control for up to 8-12 hours. Adjustments to dosage and formulation can help tailor the duration to individual needs under medical supervision.