What over-the-counter medicine can I take for sinus and throat infection?

OTC cold meds. Most over the counter cold medications combine antihistamines, decongestants and cough suppressants. People with hypertension should avoid those with pseudoephedrine. Guaifenesin is available is some preparations and is a great addition to the combination as it can thin secretions and promote drainage (MUST drink plenty of water for this to work properly).
Sinus and throat. Decongestants and saline rinses will help your sinusitis. If you have persistent throat pain, see your pmd for a throat culture.
Infections. Usually require antibiotics to treat. If you are having drainage, sore throat, etc. Taking any over the counter sinus cold & flu meds may give you some relief but if it is truly an infection they will mask the symptoms. It is best to see you MD or a Nurse Practitioner to check for infection and give you antibiotics if indicated.

Related Questions

How do I know if I have a sinus and throat infection?

Many. Nasal discharge, sore throat, fever, difficulty swallowing, headache, sensitivity to light can all be signs and symptoms.

I've been dizzy for 3 days now what could it be I've been on amoxil (amoxicillin) and dexamethasone for 6 days now for sinus and throat infection?

Anything. Your dizziness can have any cause at this time. Change in blood pressure especially when you change positions, known as orthostatic hypotension. Side effects of medication is possible too, especially dexametasone. I'd stop (it sounds an overkill to treat sinus/throat infection for that long with it). Also, make sure you drink plenty of fluids and take over-the-counter probiotic with your ab.

What are the chances of a 28 year old getting tooth discoloration from doxycycline? Taking it for 10 days for sinus and throat infection. 100mg bid

You're safe. Any of the tetracyclines, which includes doxycycline need to be taken when the teeth are developing in order to discolor the teeth. Don't worry, your teeth will not discolor.

I have a throat infection from my sinus draining & got loratadine for it. Now I have little red bumps in the back of my throat and on my tonguenormal?

Post nasal drip. Your symptoms may be due to post nasal drip. Allergy medicines may help this but if symptoms continue see a doctor to rule out possibility of infection or allergies needing prescription medicines.