When nebulized into a face mask, mouthpiece, or tracheostomy, 1 to 10 mL of the 20% acetylcysteine solution or 2 to 20 mL of the 10% solution may be given every 2 to 6 hours; the recommended dose of acetylcysteine solution for most patients is 3 to 5 mL of the 20% solution or 6 to 10 mL of the 10% solution three to four times a day. Acetylcysteine solution may interact with other drugs. Tell your doctor all medications and supplements you use. Tell your doctor if you are pregnant or plan to become pregnant before treatment with acetylcysteine solution; it is unknown if it would affect a fetus. It is unknown if acetylcysteine solution passes into breast milk. Consult your doctor before breastfeeding.