Drug Interactions between alectinib and Prevduo

Ask your doctor before using neostigmine together with glycopyrrolate. Using these medications together can cause increasing muscle weakness. In addition, such use may mask the less serious, gastrointestinal signs of glycopyrrolate overdose and lead to difficulty breathing, chest pain, and possibly death. If your doctor prescribes these medications together, you may need a dose adjustment or special tests to safely use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Both alectinib and neostigmine can slow the heart rate, and using them together may increase this effect and cause irregular heart rhythm and blood pressure problems. Talk to your doctor if you have any questions or concerns. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. Contact your doctor if you develop significant decreases in heart rate or symptoms such as dizziness, lightheadedness, or feeling faint. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.