Can pseudoephedrine hydrochloride sustained-release capsules cause drowsiness?

Dec 22, 2021 Source: Cainiu Health
Disease description:

Recently, I’ve been feeling slightly dizzy and experiencing dry mouth, so I took Compound Pseudoephedrine Hydrochloride Sustained-Release Capsules. I heard this medication may cause drowsiness—will it actually make me sleepy?

Doctor's answer (2)
Dr. Shi Jizhou
Taking compound pseudoephedrine hydrochloride sustained-release capsules may cause drowsiness. If a patient has an underlying medical condition and is physically weak, and requires this medication to control symptoms, the drug will exert its therapeutic effect in the body to alleviate those symptoms—this may result in drowsiness, which is considered a normal response.