How long does it take for an intramuscular injection to take effect?

It is a very common way to treat some diseases by injecting drugs. It does not take a long time like infusion and does not take as long to take effect as taking medicine. Therefore, it is a commonly used treatment method. Intramuscular injection is a relatively common method. It can be injected in people's arms or buttocks. Many people have questions about how long it takes for intramuscular injection to take effect. The following will introduce how long it takes for intramuscular injection to take effect.

The effect on the buttocks muscles takes 3-7 minutes, and whether it loses its effect depends on the drug.

After the drug is administered intravenously, it can be directly transported to the whole body through the blood to take effect. Its biggest feature is its rapid onset of effect. After intramuscular injection, the drug must be absorbed by the capillaries before reaching the large blood vessels, and then transported to various parts of the body to take effect. Compared with intravenous administration, an absorption process is added. Therefore, compared with intravenous administration, the time for intramuscular injected drugs to take effect in the body is much later. Regarding your question about different dosages for different administration routes, it is mainly related to the degree of natural loss of the drug from the time it enters the body to the time it takes effect.

Intramuscular injection

Intramuscular injections are not possible under all circumstances. For example, if there is a nodule or infection at the injection site, intramuscular injection treatment is not recommended.

injection

Intramuscular injection is mainly used when intravenous injection is not suitable or possible, when the therapeutic effect is required to be more rapid than subcutaneous injection, and when injecting drugs with strong irritation or large dosage.

Injection site

The most commonly used injection site for intramuscular injection is the gluteus maximus, followed by the gluteus medius, gluteus minimus, vastus lateralis and deltoid muscles. Precise positioning of the injection site is very important for intramuscular injection. Injury to the sciatic nerve should be avoided when injecting into the gluteus maximus muscle.

Body position: Can be sitting or lying.

(1) Lying position: During intramuscular injection in the buttocks, the following positions can be used to relax the local muscles and relieve pain and discomfort:

Side-lying position: upper leg straight and relaxed, lower leg slightly bent.

Prone position: toes facing each other, heels hanging apart, head tilted to one side.

Supine position: often used for critically ill patients and patients who cannot turn over. It is more convenient to use the gluteus medius and gluteus minimus muscle injection method.

(2) Sitting position: This is the position commonly used by outpatients when receiving injections. It can be used for the deltoid head of the upper arm. If the injectable medication is an oil or suspension, a thicker needle is required; prepare the liquid medicine according to the doctor's instructions.