A very serious allergic reaction to this drug is rare. Avoid drinking alcohol and smoking while being treated with this medication. Do not store your drugs in the bathroom. During the pregnancy this treatment should be used only when strongly necessary. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. We disclaim reliability of this information and mistakes it could contain. If you see that it is near the time for the next dose, skip the missed dose and resume your usual dosing schedule. If you become constipated while using this drug, consult your pharmacist for help in selecting a laxative. Tell your doctor right away if you get sunburned or have skin blisters/redness.