How Long Does Deworming Medicine Take to Work?

Infecting worms can happen to humans and pets. The speed of a particular deworming medicine can vary depending on many factors. This can include which worm and what active ingredients they carry, how bad the infection is, and which specific medicine is being used. Some can begin to act on the worms in a matter of hours while others can take days until the infection is considered controlled.

For pets (cats and dogs), worming tablets can be used for roundworms, hookworms, whipworms, and tapeworms. For each worm, there is a specific medicine that can be used by a human (albendazole, mebendazole, and ivermectin). The specific medicine depends on which parasite and how bad the infection is.

There can be many different answers for how fast deworming can work.

How Quickly Does Deworming Medicine Work?

There is no defined time for how fast deworming medicine can work because there are many different deworming medicine.

Generally, it can take hours for deworming medicine to begin to act, but a noticeable improvement in the removal of the parasite can take days or be done in a matter of hours.

For pets, it is not uncommon to see worms or worm fragments after they have been pooped out. Just because you can’t see them it doesn’t mean the medicine hasn’t worked. Some can be digested by the parasitic worms or are simply too small to be noticed.

There can be many different medicines in a particular product. Some infections can be treated with just one dose of the medicine, while other infections require a repeat treatment.

What Determines How Fast Deworming Medicine Works?

The Types of Worm

There are many medicine varieties that treat different types of parasites.

For example:

Tapeworms can be treated by using Praziquantel.

Certain hookworms and roundworms can be treated by using Pyrantel.

Fenbendazole is an ingredient in select veterinary products that target some intestinal nematodes.

Albendazole and mebendazole are used in humans to target multiple intestinal nematodes.

Ivermectin is indicated for some of the parasitic infections such as strongyloidiasis and onchocerciasis.

The time to eliminate the infection can vary because of the different mechanisms of the drugs.

Severity of the Infection

For a less severe infection, the time to eliminate the infection can be shorter compared to a more severe infection.

A second dose may also be necessary to target other phases of the parasite life cycle.

The Drug and the Formulation

The formulation and dosing may alter the time to eliminate the parasite.

Because of this, you must not presume that two different deworming medicines will work at the same rate.

Be sure to adhere to the recommendations for the specific deworming medicines or the instructions given by your physician or veterinarian.

Common Deworming Medicine Ingredients

Worming products will have different active ingredients.

Praziquantel

Praziquantel is commonly used in both veterinary and human medicine for a number of parasitic infections. Praziquantel has broad use for the treatment of tapeworms and some flukes.

Pyrantel

Pyrantel has use for some of the intestinal roundworm infections, such as pinworms and hookworms, depending on the product and also the species.

Fenbendazole

Fenbendazole is a component of some veterinary dewormer products and is active against some intestinal nematodes, including hookworms and whipworms.

Do not consider a veterinary dewormer a valid deworming medicine for humans. All veterinary medicines have limited use for the specified animal.

Albendazole and mebendazole

Albendazole and mebendazole are two highly effective treatments for many types of intestinal helminths in humans. The type of parasite determines the choice of medication and the dose.

What Happens After Taking a Deworming Medicine?

If the parasites are susceptible to the deworming medication, the medication will then take effect.

Depending on the parasite and the choice of medication, you might begin to notice:

• Worms or pieces of worms in the faces
• Change in the frequency of bowel movements
• Less abdominal discomfort
• Less anal itching in certain cases
• Increased appetite or increased energy due to the infection resolving
• Symptoms can take time to fully disappear.

Some symptoms may take time to resolve even after the parasites are removed.

What If You Don’t See Worms in the Stool?

Don’t panic.

The absence of worms in the stool after treatment does not indicate a failed deworming.

Some parasites are either too small to be seen or are broken down in the digestive tract. In addition, some medications have a neurodegenerative effect on the parasites, rendering them unfit to be passed in a fecal sample.

If the symptoms do not resolve, or if new symptoms arise, consult an appropriate health care practitioner. This is better than self-administering another dose of the the medication.

Can Deworming Medicine Cause Side Effects?

Yes, some people or some pets may notice temporary symptoms after treatment.

Some symptoms may include:

• Nausea
• Abdominal discomfort
• Diarrhea
• Vomiting
• Headache
• Dizziness
• Fatigue

Some pets may notice vomiting, diarrhea, and a transient increase in lethargy while taking some deworming products.

Contact a healthcare professional or veterinarian for severe, persistent, or strange symptoms.

How Long Does It Take for Pets to Recover?

Recovery for cats and dogs differs based on the infestation level and type of parasite.

Parasite control may take time as some products work only partially the first time.

The deworming frequency for puppies and kittens may be different than for adult pets. Pets that are frequently out of the house, that hunt, or that are in contact with other animals may be reinfected quickly.

Regular vet visits along with stool sample testing may indicate the need for further deworming.

How Can You Prevent Worm Reinfection?

Deworming treatment is only a fraction of controlling these parasites.

Some preventative actions include:

• Following the scheduled parasite control set by the veterinarian.
• Quickly picking up any feces.
• Cleaning living spaces regularly.
• Avoiding letting pets eat potentially infected animals.
• Using recommended parasite protections.

For young kittens and puppies, it is especially important to adhere to the schedule for visits and deworming.

Some good methods of preventing parasites include thorough handwashing, properly cooking meat, and avoiding contaminated soil and water.

Final Words

The time it takes for deworming medicines to completely control an infection differs from case to case. Parasite type, the active ingredient in the medicine, the dose, and the severity of the infection all affect the time it takes to control an infection.

The deworming products your pets take may contain praziquantel, pyrantel, or febantel. Your pets will take these deworming products to combat specific worms. Humans may take albendazole, mebendazole, or ivermectin to combat specific parasitic infections.

Making sure you use the correct product on the correct parasite and that you adhere to the correct dosing schedule may be the most important step in controlling a parasitic infection. If symptoms fail to improve or return, do not take another dose. Instead, seek counsel from a healthcare provider or a veterinarian.