Please check with a physician if you have health questions or concerns. Talk to a doctor now. Diphenhydramine is an antihistamine that reduces the effects of natural chemical histamine in the body. Call your doctor for medical advice about side effects. Dilated blood vessels can cause nasal congestion (stuffy nose).Diphenhydramine and phenylephrine is a combination medicine used to treat symptoms of the common cold or seasonal allergies, including sneezing, runny or stuffy nose, and itchy, watery eyes.Diphenhydramine and phenylephrine may also be used for purposes not listed in this medication guide.You should not use this medicine if you are allergic to diphenhydramine or phenylephrine.Ask a doctor or pharmacist if it is safe for you to use this medicine if you have other medical conditions, especially:It is not known whether diphenhydramine and phenylephrine will harm an unborn baby. Bad allergies hit and I took a 12 hour Sudafed...Wow! Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. Drug information contained herein may be time sensitive. The ability to fix depression has only come to mind this past 6 months. You should not use antihistamine medication to make a child sleepy.Call your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a headache, cough, or skin rash. Dilated blood vessels can cause nasal congestion (stuffy nose). If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist. By the way Im 47. Diphenhydramine (CR) Benadryl and others Disopyramide (KR) Norpace Dobutamine (SR) Dobutrex ... Phenylephrine (SR) Neosynephrine Phenylpropanolamine (SR) Acutrim and others ... Geodon and others Zotepine (PR) Losizopilon and others Zuclopenthixol (Zuclopentixol) (PR) Cisordinol and others Sudafed Pe (Phenylephrine) is a good medication for relieving stuffy nose. I was trying to figure out which vitamin I took today which one I didnt to figure out what made me feel so normal, I felt like a million dollars brand new I can think clearly I had normal amount of energy to actually go grocery shopping after work (I cant do anything after work except make it home and be miserable all nite) Then it dawned on me I took Sudafed and started to google it if it helps depression IT DOES. I usually have to take it almost every day because I really do have allergies due to grasses and different flowering trees, but was I off it for two days. Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Well I could only take that for 3 months and my healthcare provider will not prescribe it again for a year. God and behold I get stuffy nose and since I dont do well with new created medicine I decided to get Sudafed. Antidepressant effect of Diphenhydramine? Check the medication label if you have Use exactly as directed on the label, or as prescribed by your doctor. SSRIs and birth defects Are there any natural alternatives to Zoloft? If you do not have a dose-measuring device, ask your pharmacist for one.Call your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a If you need surgery or medical tests, tell the doctor ahead of time if you have taken a cold medicine within the past few days.Store at room temperature away from moisture and heat.Since cold or allergy medicine is used when needed, you may not be on a dosing schedule. Disclaimer: The information contained herein should NOT be used as a substitute for the advice of an appropriately qualified and licensed physician or other health care provider. Try to sudafed get your kid off their killer pills and research everything before putting in your body. Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Antihistamines and decongestants may also slow breast milk production. Be careful if you drive or do anything that requires you to be alert.Drinking alcohol with this medicine can cause side effects.Ask a doctor or pharmacist before using any other cold, allergy, or sleep medicine. The different salts have different molecular weights (diphenhydramine hydrochloride: 291.8 g/mol, diphenhydramine citrate: 447.5 g/mol) and rates of dissolution and absorption characteristics. She has tried to commit suicide two times and I am very worried for her mental state.