Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Sieb on how long does it take for flomax to work: Flomax (tamsulosin) is an Alpha blocker and work within 24 hours regarding its effects. If given for obstructive voiding then effects are usually seen within 2 days. If taken for a kidney stone then it takes longer but works immediately to relax the ureter to help. How to use Vermox Tablet, Chewable. Read the Patient Information Leaflet if available from your pharmacist before you start taking mebendazole and each time you get a refill. My daughter has pinworms and was prescribed 1 vermox pill which she took last night. The itching is more intense tonight - Answered by a verified Pediatrician HOW DOES VERMOX WORK? The Vermox worm treatment range contains the active ingredient mebendazole. Mebendazole is a proven treatment for a number of parasitic worm infections, including threadworm, whipworm, hookworm and roundworm. Check with your doctor right away if you have blistering, peeling, or loose skin, red skin lesions, severe acne or skin rash, sores or ulcers on the skin, or fever or chills while you are using this medicine. Store away from heat, moisture, and light. Do not store in the bathroom. Keep Vermox out of the reach of children and away from pets. Do not store in the bathroom. Keep Vermox out of the reach of children and away from pets. If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened. Be ready to tell or show what was taken, how much, and when it happened. does vermox 500 makes any side effect, cause i had a pin worms and i took one pill from vermox 500 before 12 days , then after 3 days i felt something itching like pin worm, so i took another pill, te … Doctor answers on Symptoms, Diagnosis, Treatment, and More: Dr. Abdul khalek on how long does it take for pinworms to go away: Symptoms should usually subside over a week or two unless complications have occurred. for topic: How Long Does It Take For Pinworms To Go Away. Does Vermox protect my family from future worm infections? Vermox is designed to effectively kill worms present in the intestine. To prevent worms from re-occurring it may be necessary to dose your family again (3 weeks after the first dose), if symptoms are still present.