Phenylephrine hydrochloride is a sympathomimetic that acts directly on a1-adrenergic receptors that constrict blood vessels and increase blood pressure. It has a weaker effect on blood pressure than norepinephrine, but has a longer duration of action. To ensure the effectiveness of treatment, patients need to take the drug according to the instructions of the doctor, professional pharmacist.

Lungastic 20 is a drug that is prepared in the form of a tablet and is taken by mouth with water. It has beta-sympathomimetic effects. Therefore, the drug is used in some cases of bronchospasm.

Thuốc cường giao cảm là thuốc tác động trên hệ thần kinh thực vật hay gọi là hệ thần kinh tự động. Có nhiều nhóm thuốc cường giao cảm khác nhau và tác động của nó cũng có sự khác nhau.