Yes, Kamagra 100 mg, which contains sildenafil citrate, like other medications in the class of phosphodiesterase type 5 (PDE5) inhibitors, can cause side effects. Some common side effects of Kamagra 100 mg include:

Headache
Flushing (redness or warmth in the face, neck, or chest)
Indigestion or upset stomach
Nasal congestion
Dizziness or lightheadedness
Vision changes, such as blurred vision or changes in color vision
Back pain or muscle pain
Nausea
These side effects are usually mild to moderate in nature and often transient, resolving on their own as the medication is metabolized and cleared from the body. However, if these side effects persist or become bothersome, individuals should consult their healthcare provider.

In some cases, Kamagra 100 mg and other PDE5 inhibitors can cause more serious side effects, including:

Priapism: An erection that lasts longer than four hours. Priapism requires immediate medical attention to prevent long-term complications such as tissue damage and permanent erectile dysfunction.
Sudden hearing loss or changes in hearing
Sudden vision loss or changes in vision
Allergic reactions, including rash, itching, swelling of the face, lips, or tongue, or difficulty breathing
It's essential for individuals using Kamagra 100 mg to be aware of these potential side effects and to seek medical attention if they experience any concerning symptoms. Additionally, individuals should discuss their medical history and any medications they are taking with their healthcare provider before using Kamagra 100 mg to ensure it is safe and appropriate for them.