Harvey Fierstein lost 120 pounds after taking weight-loss medication.

The "Mrs. Doubtfire" star weighed 310 pounds at his heaviest before making the decision to begin taking "Zepbound."

After losing 120 pounds, Fierstein told Page Six he "put 15 back on, which I’ve sort of stayed at that."

TRACY MORGAN CLAIMS HE ‘OUT-ATE OZEMPIC’ AND GAINED 40 POUNDS ON WEIGHT-LOSS DRUG

Fierstein has been stuck in a cycle of gaining and losing weight for years.

"I’ve been skinny before, that’s the sad part," the 70-year-old actor told the outlet. "I’ve been skinny, I’ve been fat, I’ve been skinny, I’ve been fat."

For Fierstein, this time around he feels like a "normal person" instead of someone who is dieting. 

"What’s different is what the drug actually does for you, which is, I don’t feel like I’m dieting," the playwright explained. "I feel like a normal person. I can go and have dinner with friends and not have to eat every piece of bread on the table and then not go have ice cream when I’ve done with dinner."

"I know what it is to be full like a normal person."

LIKE WHAT YOU’RE READING? CLICK HERE FOR MORE ENTERTAINMENT NEWS

The "Mulan" actor claimed "people don’t understand that being fat is not a choice."

"It’s something that your body is out of whack and this puts your body in whack," Fierstein explained.

"I’m a great believer in it," he added of the medication.

Fox News Digital reached out to Fierstein for additional comment.

CLICK HERE TO SIGN UP FOR THE ENTERTAINMENT NEWSLETTER

Many celebrities have taken the route of weight-loss medication ever since the rise of Ozempic – including Oprah Winfrey, Kelly Clarkson and Sharon Osbourne.

However, the drug first approved by the U.S. Food and Drug Administration (FDA) in 2017 for Type 2 diabetes doesn't always work for everyone. "30 Rock" star Tracy Morgan revealed he "out-ate" Ozempic and actually gained weight while taking the medication.

"I’ve learned to out-eat Ozempic," the comedian said during an appearance on "The Tonight Show Starring Jimmy Fallon" in March. "I out-ate Ozempic. I’ve gained 40 pounds. I’m like Magic Johnson. I gained 40 pounds."