Reliever Steve Howe admitted to Minnesota Twins officials last night he used cocaine last weekend in what the baseball club called a "temporary recurrence of his past problem."

Twins President Howard Fox said Howe, 27, would be examined by a doctor today and no decision on his future would be made until then. Howe came to Minnesota after being released by the Los Angeles Dodgers following a long sequence of absences, suspensions and rehabilitation efforts.

Howe met with Fox during the Twins' game against Texas last night. He had skipped the weekend series against Cleveland, telling the club he was in the Detroit area to visit his wife's grandfather, who had suffered a stroke.

According to family members contacted by the Minneapolis Star and Tribune, Howe never appeared at his grandfather's.

"I feel very badly about it. He's a nice person and he has great capabilities," Fox said. "He's very embarrassed that he let everybody down and wants to come back." . . .

Zdenka Silhava, world- record holder in the women's discus, and Remigius Machura, a top shot putter, are being banished from track and field competition after testing positive for illegal substances at last month's European Cup finals in Moscow, European Athletics Association secretary Pierre Dasriaux said in Paris.

The two Czechoslovakian athletes' performances in that Aug. 18-19 meet and all meets since then were nullified. Machura, bronze medalist in the 1983 World Championships, was second in his specialty in Moscow. Silhava, who set the world mark of 244 feet 7 1/2 inches in Nitra, Czechoslovakia, in August 1984, was third.

Machura also forfeits the shot put title he won at the recent World Student Games in Japan. It goes to Olympic champion Alessandro Andrei of Italy.