hello dear. thanks for trusting HCM. I have gone through your questions. Cheston cold is used for relieving cold and flu symptoms. cetirizine is an anti-histamines to heal allergy symptoms phenylephrine works as a nose decongestant paracetamol is an analgesic medicine for pain and also fever. for dosage you can use it twice to thrice a day. if the symptoms are not getting better, please meet your local doctor. don t forget to maintain your immune system by eating healthy food, drinking plenty of warm water and juice, getting enough rest. I hope you can get well soon and these can clarify your queries. if there s anything else you need to know, feel free to ask me in HCM. take care. best regards, dr. Asti Yuliadha