Checked against UN INCB controlled substance lists and Singapore rules.
Amphetamine is strictly controlled in Singapore. Personal import is generally not permitted.
Adderall contains a substance on the UN International Narcotics Control Board lists. Most countries that signed the UN drug conventions expect you to carry a prescription and declare it.
Leave it at home. Ask your doctor about an alternative that is legal at your destination, and carry a doctor's letter describing your condition.
Official source for Singapore: www.hsa.gov.sg
Check Adderall in 21 countriesNot legal or medical advice. Rules change and depend on dose, form and quantity. Always confirm with the Singapore embassy or health authority before you fly. We never tell you a medicine is "safe" to carry.