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Tetrahydrozoline HCl nasal

Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.



This medication promotes nasal drainage and relieves nasal stuffiness. It is used to relieve symptoms associated with a cold, hay fever, allergies, sinus infections and other related conditions. It is also used to relieve plugged ears.

How To Use

This medication is used in the nose as directed. To apply nasal spray, first blow your nose to help improve penetration of the medication. Keeping your head upright, place the nasal spray just inside the nostril being careful not to touch the container to the inside of the nose. Squeeze the container as you inhale deeply through your nose. Sniff hard a few times to be sure the medication reaches deep into the nose. Do not use this more often than directed or increase your dose. Therapy usually lasts for 3 to 5 days. Excessive use of this medication can actually increase nasal congestion.

Side Effects

Stinging, burning, sneezing, increased nasal discharge, drying of the nostrils, and altered taste may occur. If these effects continue or become bothersome, inform your doctor. Notify your doctor if you develop: a rapid or pounding heartbeat, dizziness, trouble sleeping, shaking of the hands, tremors, unusual weakness. This medication may cause dizziness. Use caution engaging in activities requiring alertness. If you notice other effects not listed above, contact your doctor or pharmacist.


Tell your doctor if you have: heart problems, thyroid disease, diabetes, high blood pressure, seizure disorder, glaucoma, allergies (especially to sulfites). The elderly and children may be more susceptible to the effects of this medication. Use this with caution. This medication should be used only if clearly needed during pregnancy. Discuss the risks and benefits with your doctor. Since small amounts of this medication are found in breast milk, consult your doctor before breast-feeding.

Drug Interactions

Tell your doctor of any over-the-counter or prescription medication you may take especially of: high blood pressure drugs, antidepressants, cough-and-cold or allergy drugs. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include drowsiness, unconsciousness, sweating, dizziness, headache, or unusually fast heartbeat.


There are various nasal decongestants available, many without a prescription. Discuss with your doctor or pharmacist the best product for you.

Missed Dose

If you miss a dose, take it as soon as remembered; do not take it if it is near the time for the next dose, instead, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.


Store at room temperature between 59 and 86 degrees F (15 and 30 degrees C) away from heat and light. Do not store in the bathroom. Do not share the container with anyone else. Throw away the container when the medication is no longer required.